Adds javalib and sawja

Javalib is a library that parses Java .class files into OCaml data
structures. Sawja is a library written in OCaml, relying on Javalib to
provide a high level representation of Java bytecode programs.

Homepage: http://sawja.inria.fr/

pkgs/development/ocaml-modules/javalib/Makefile.config.example.patch

@@ -0,0 +1,9 @@
+--- javalib-2.3-orig/Makefile.config.example	2013-10-30 08:35:30.000000000 +0100
++++ javalib-2.3/Makefile.config.example	2014-07-06 17:32:29.799398394 +0200
+@@ -1,6 +1,3 @@
+-export OCAMLFIND_DESTDIR=$(LOCALDEST)
+-export OCAMLPATH=$(LOCALDEST)
+-
+ OCAMLC = $(FINDER) ocamlc $(FLAGS)
+ OCAMLOPT = $(FINDER) ocamlopt $(OPT_FLAGS)
+ OCAMLDOC = $(FINDER) ocamldoc