perl: Link against libper.so in modules

Fixes #229.

packages/perl/Kid.pm.patch

@@ -0,0 +1,16 @@
+diff -u -r ../perl-5.22.1/cpan/ExtUtils-MakeMaker/lib/ExtUtils/Liblist/Kid.pm ./cpan/ExtUtils-MakeMaker/lib/ExtUtils/Liblist/Kid.pm
+--- ../perl-5.22.1/cpan/ExtUtils-MakeMaker/lib/ExtUtils/Liblist/Kid.pm	2015-10-17 08:38:37.000000000 -0400
++++ ./cpan/ExtUtils-MakeMaker/lib/ExtUtils/Liblist/Kid.pm	2016-04-22 18:38:59.367520265 -0400
+@@ -19,9 +19,9 @@
+ use File::Spec;
+ 
+ sub ext {
+-    if    ( $^O eq 'VMS' )     { return &_vms_ext; }
+-    elsif ( $^O eq 'MSWin32' ) { return &_win32_ext; }
+-    else                       { return &_unix_os2_ext; }
++    # Termux modification to work with android linker.
++    my $res = $Config{perllibs} . " -L" . $ENV{'TERMUX_PKG_SRCDIR'} . " -lperl";
++    return ( $res, '', $res, '' );
+ }
+ 
+ sub _unix_os2_ext {

packages/perl/build.sh

@@ -4,7 +4,7 @@ TERMUX_PKG_DESCRIPTION="Capable, feature-rich programming language"
 # cpan modules will require make:
 TERMUX_PKG_DEPENDS="make"
 TERMUX_PKG_VERSION=5.22.1
-TERMUX_PKG_BUILD_REVISION=3
+TERMUX_PKG_BUILD_REVISION=4
 TERMUX_PKG_SRCURL=http://www.cpan.org/src/5.0/perl-${TERMUX_PKG_VERSION}.tar.gz
 # Does not work with parallell builds:
 TERMUX_MAKE_PROCESSES=1
@@ -24,6 +24,11 @@ termux_step_post_extract_package () {
 
 	# Remove old installation to force fresh:
 	rm -rf $TERMUX_PREFIX/lib/perl5
+
+	# Remove patch from perl-cross for file we patch ourselves:
+	rm $TERMUX_PKG_SRCDIR/cnf/diffs/liblist.patch
+	# Export variable used by Kid.pm.patch:
+	export TERMUX_PKG_SRCDIR
 }
 
 termux_step_configure () {