ruby: update to 2.7.1

New subpackages (reflect of ongoing ruby gemification)
- ruby-benchmark (from ruby-debuglib)
- ruby-delegate (from ruby-misc)
- ruby-getoptlong (from ruby-misc)
- ruby-net-pop (from ruby-net)
- ruby-net-imap (from ruby-net)
- ruby-observer (from ruby-patterns, now gone)
- ruby-open3 (from ruby-misc)
- ruby-readline-ext (was ruby-readline, while ruby-readline now selects either
    ruby-readline-ext or ruby-reline)
- ruby-reline (alternative to ruby-readline-ext as pure ruby)
- ruby-singleton (from ruby-patterns, now gone)
- ruby-timeout (from ruby-multithread)

Dropped subpackages:
- ruby-cmath (gone in 2.7.0)
- ruby-e2mmap (gone in 2.7.0)
- ruby-patterns (splitted into ruby-observer, ruby-singleton)
- ruby-scanf (gone in 2.7.0)
- ruby-shell (gone in 2.7.0)
- ruby-sync (gone in 2.7.0)
- ruby-thwait (gone in 2.7.0)

Ruby 2.7.0 also dropped profile.rb and profiler.rb (they were in ruby-debuglib)

Patches changes:
- Dropped patch 001_fix_isnan_isinf_finite_with_uclibc.patch (now in release)
- Added 100-musl.patch, fixing mainly coroutine implementation selection

Helper scripts changes:
- ruby_missingfiles: do not ignore ruby-dev files
- ruby_find_pkgsdeps: better detect circular dependencies

Ruby 2.7.1 fixes these security issues:

* CVE-2020-10663: Unsafe Object Creation Vulnerability in JSON (Additional fix)
* CVE-2020-10933: Heap exposure vulnerability in the socket library

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>

lang/ruby/patches/001_fix_isnan_isinf_finite_with_uclibc.patch

@@ -1,86 +0,0 @@
-From 74f94b3e6ebf15b76f3b357e754095412b006e94 Mon Sep 17 00:00:00 2001
-From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
-Date: Fri, 8 Feb 2019 07:22:55 +0000
-Subject: [PATCH] configure.ac: check finite,isinf,isnan as macros first
-
-[ruby-core:91487] [Bug #15595]
-
-git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67036 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
----
- aclocal.m4                    |  1 +
- configure.ac                  | 13 ++++---------
- tool/m4/ruby_replace_funcs.m4 | 13 +++++++++++++
- 3 files changed, 18 insertions(+), 9 deletions(-)
- create mode 100644 tool/m4/ruby_replace_funcs.m4
-
---- a/aclocal.m4
-+++ b/aclocal.m4
-@@ -35,6 +35,7 @@ m4_include([tool/m4/ruby_func_attribute.
- m4_include([tool/m4/ruby_mingw32.m4])
- m4_include([tool/m4/ruby_prepend_option.m4])
- m4_include([tool/m4/ruby_prog_gnu_ld.m4])
-+m4_include([tool/m4/ruby_replace_funcs.m4])
- m4_include([tool/m4/ruby_replace_type.m4])
- m4_include([tool/m4/ruby_rm_recursive.m4])
- m4_include([tool/m4/ruby_setjmp_type.m4])
---- a/configure.ac
-+++ b/configure.ac
-@@ -946,9 +946,6 @@ main()
- 		ac_cv_func_fsync=yes
- 		ac_cv_func_seekdir=yes
- 		ac_cv_func_telldir=yes
--		ac_cv_func_isinf=yes
--		ac_cv_func_isnan=yes
--		ac_cv_func_finite=yes
- 		ac_cv_func_lchown=yes
- 		ac_cv_func_link=yes
- 		ac_cv_func_readlink=yes
-@@ -999,9 +996,6 @@ main()
- [netbsd*], [	LIBS="-lm $LIBS"
- 		],
- [dragonfly*], [	LIBS="-lm $LIBS"
--		# isinf() and isnan() are macros on DragonFly.
--		ac_cv_func_isinf=yes
--		ac_cv_func_isnan=yes
- 		],
- [aix*],[	LIBS="-lm $LIBS"
- 		ac_cv_func_round=no
-@@ -1724,11 +1718,8 @@ AC_REPLACE_FUNCS(dup2)
- AC_REPLACE_FUNCS(erf)
- AC_REPLACE_FUNCS(explicit_bzero)
- AC_REPLACE_FUNCS(ffs)
--AC_REPLACE_FUNCS(finite)
- AC_REPLACE_FUNCS(flock)
- AC_REPLACE_FUNCS(hypot)
--AC_REPLACE_FUNCS(isinf)
--AC_REPLACE_FUNCS(isnan)
- AC_REPLACE_FUNCS(lgamma_r)
- AC_REPLACE_FUNCS(memmove)
- AC_REPLACE_FUNCS(nan)
-@@ -1741,6 +1732,10 @@ AC_REPLACE_FUNCS(strlcpy)
- AC_REPLACE_FUNCS(strstr)
- AC_REPLACE_FUNCS(tgamma)
- 
-+RUBY_REPLACE_FUNC([finite], [@%:@include <math.h>])
-+RUBY_REPLACE_FUNC([isinf], [@%:@include <math.h>])
-+RUBY_REPLACE_FUNC([isnan], [@%:@include <math.h>])
-+
- # for missing/setproctitle.c
- AS_CASE(["$target_os"],
- [aix* | k*bsd*-gnu | kopensolaris*-gnu | linux* | darwin*], [AC_DEFINE(SPT_TYPE,SPT_REUSEARGV)],
---- /dev/null
-+++ b/tool/m4/ruby_replace_funcs.m4
-@@ -0,0 +1,13 @@
-+# -*- Autoconf -*-
-+dnl RUBY_REPLACE_FUNC [func] [included]
-+AC_DEFUN([RUBY_REPLACE_FUNC], [dnl
-+    AC_CHECK_DECL([$1],dnl
-+        [AC_DEFINE(AS_TR_CPP(HAVE_[$1]))],dnl
-+        [AC_REPLACE_FUNCS($1)],dnl
-+        [$2])dnl
-+])
-+
-+dnl RUBY_REPLACE_FUNCS [funcs] [included]
-+AC_DEFUN([RUBY_REPLACE_FUNCS] [dnl
-+    m4_map_args_w([$1], [RUBY_REPLACE_FUNC(], [), [$2]])dnl
-+])

lang/ruby/patches/100-musl.patch

@@ -0,0 +1,24 @@
+--- a/coroutine/copy/Context.h
++++ b/coroutine/copy/Context.h
+@@ -13,6 +13,7 @@
+ #include <string.h>
+ #include <stdlib.h>
+ #include <alloca.h>
++#include <sys/types.h>
+ 
+ #define COROUTINE __attribute__((noreturn)) void
+ 
+--- a/configure.ac
++++ b/configure.ac
+@@ -2344,7 +2344,10 @@ AS_CASE([$rb_cv_coroutine], [yes|''], [
+             rb_cv_coroutine=copy
+         ],
+         [*], [
+-            rb_cv_coroutine=ucontext
++            AC_CHECK_FUNCS([getcontext swapcontext makecontext],
++                [rb_cv_coroutine=ucontext],
++                [rb_cv_coroutine=copy; break]
++            )
+         ]
+     )
+     AC_MSG_RESULT(${rb_cv_coroutine})