Create explicit folders for more language libs.

Library/Homebrew/keg.rb

@@ -40,7 +40,7 @@ class Keg <Pathname
     $n=0
     $d=0
 
-    mkpaths=(1..9).collect {|x| "man/man#{x}"} <<'man'<<'doc'<<'locale'<<'info'<<'aclocal'
+    share_mkpaths=%w[aclocal doc info locale man]+(1..9).collect{|x|"man/man#{x}"}
 
     # yeah indeed, you have to force anything you need in the main tree into
     # these dirs REMEMBER that *NOT* everything needs to be in the main tree
@@ -48,14 +48,20 @@ class Keg <Pathname
     link_dir('bin') {:skip}
     link_dir('sbin') {:link}
     link_dir('include') {:link}
-    link_dir('share') {|path| :mkpath if mkpaths.include? path.to_s}
+    link_dir('share') {|path| :mkpath if share_mkpaths.include? path.to_s}
 
     link_dir('lib') do |path|
       case path.to_s
-      when /^pkgconfig/ then :mkpath
-      when /^php/ then :mkpath
+      # pkg-config database gets explicitly created
+      when 'pkgconfig' then :mkpath
+      # lib/language folders also get explicitly created
+      when 'ghc' then :mkpath
+      when 'lua' then :mkpath
+      when 'ocaml' then :mkpath
       when /^perl5/ then :mkpath
-      when /^python2\.6/ then :mkpath
+      when 'php' then :mkpath
+      when /^python[23]\.\d$/ then :mkpath
+      else :link
       end
     end