treewide: move all perl packages into its own folder

This makes it in sync with Python packages.
Python packages has its own place in /lang/python
Perl does not, so this fixes it.

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

lang/perl/perl-xml-parser/patches/030-expat.patch

@@ -0,0 +1,11 @@
+--- a/Makefile.PL
++++ b/Makefile.PL
+@@ -65,7 +65,7 @@ Expat_Not_Installed;
+ 
+     # exiting before Makefile generation silences CPANTesters reports
+     # when expat is not available.
+-    exit 0;
++#    exit 0;
+ }
+ 
+ if ( not $expat_libpath and $] >= 5.006001 and $^O ne 'MSWin32' ) {