vim: Update to 8.1

Switch URL to HTTP. More reliable.

Added PKG_CPE_ID for proper CVE tracking.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/vim/patches/001-support-defining-compilation-date-in-SOURCE_DATE_EPOCH.patch

@@ -54,9 +54,9 @@ index e287124..5a16797 100644
 +  AC_DEFINE_UNQUOTED(BUILD_DATE, ["$BUILD_DATE"])
 +fi
 +
- dnl Check for the flag that fails if stuff are missing.
- 
- AC_MSG_CHECKING(--enable-fail-if-missing argument)
+ dnl Check that the C99 features that Vim uses are supported:
+ if test x"$ac_cv_prog_cc_c99" != xno; then
+   dnl If the compiler doesn't explicitly support C99, then check
 diff --git a/src/version.c b/src/version.c
 index 65f5a4b..9422657 100644
 --- a/src/version.c

utils/vim/patches/002-remove_helptags_generation.patch

@@ -1,6 +1,6 @@
 --- a/runtime/doc/Makefile
 +++ b/runtime/doc/Makefile
-@@ -310,7 +310,6 @@ all: tags vim.man evim.man vimdiff.man v
+@@ -317,7 +317,6 @@ all: tags vim.man evim.man vimdiff.man v
  # Use Vim to generate the tags file.  Can only be used when Vim has been
  # compiled and installed.  Supports multiple languages.
  vimtags: $(DOCS)