perl: add Authen::SASL::XS module

Required by Authen::SASL to have actual plug-ins to handle the
protocol.

Uses Devel::CheckLib which doesn't work with cross-compilation with
the current perlmod.mk machinery.

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

lang/perl-authen-sasl-xs/patches/100-remove-devel-checklib-checks.patch

@@ -0,0 +1,49 @@
+--- a/Makefile.PL	2009-09-22 16:22:09.000000000 -0600
++++ b/Makefile.PL	2018-01-01 18:54:13.023366252 -0700
+@@ -1,7 +1,6 @@
+ # Do yourself a favour, and don't edit this file, see README for build instructions
+ 
+ use ExtUtils::MakeMaker;
+-use Devel::CheckLib;
+ 
+ my @inc_search = qw(/opt/local/include /usr/local/include);
+ my @lib_search = qw(/opt/local/lib64 /usr/local/lib64 /opt/local/lib /usr/local/lib);
+@@ -12,15 +12,7 @@ unless (exists $args{INC} or exists $arg
+ 
+   my @incpath = grep {-d} @inc_search;
+   my @libpath = grep {-d} @lib_search;
+-  my $have_sasl2 = eval {
+-    assert_lib(
+-      lib     => "sasl2",
+-      header  => "sasl/sasl.h",
+-      libpath => \@libpath,
+-      incpath => \@incpath
+-    );
+-    1;
+-  };
++  my $have_sasl2 = 1;
+ 
+   if ($have_sasl2) {
+     $mmopt{DEFINE} = "-DSASL2" unless $use_sasl2;
+@@ -28,13 +27,6 @@ unless (exists $args{INC} or exists $arg
+   }
+   else {
+     exit(0) if $use_sasl2;
+-    @incpath = grep {-d} map { ("$_/sasl", $_) } @inc_search;
+-    check_lib_or_exit(
+-      lib     => "sasl",
+-      header  => "sasl.h",
+-      libpath => \@libpath,
+-      incpath => \@incpath
+-    );
+   }
+ 
+   $mmopt{INC}  = join " ", map {"-I$_"} @incpath;
+@@ -58,7 +50,6 @@ WriteMakefile(
+           repository => 'http://github.com/gbarr/perl-authen-sasl-xs',
+         },
+         build_requires => {
+-          'Devel::CheckLib' => 0,
+         },
+       }
+       )