lablgtk : add lablgl support

packages/lablgtk.2.16.0/files/lablgldir.patch

@@ -0,0 +1,12 @@
+diff -Naur lablgtk-2.16.0.orig/configure lablgtk-2.16.0/configure
+--- lablgtk-2.16.0.orig/configure	2012-08-23 12:37:48.000000000 +0200
++++ lablgtk-2.16.0/configure	2013-08-21 11:16:50.707187151 +0200
+@@ -4066,7 +4066,7 @@
+       cat > conftest.ml << EOF
+       open Raw
+ EOF
+-      if $CAMLC -c -I "${LABLGLDIR:=+lablGL}" conftest.ml > /dev/null 2>&1 ; then
++      if $CAMLC -c -I "$LABLGLDIR" conftest.ml > /dev/null 2>&1 ; then
+         { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LABLGLDIR" >&5
+ $as_echo "$LABLGLDIR" >&6; }
+       else

packages/lablgtk.2.16.0/opam

@@ -2,12 +2,13 @@ opam-version: "1"
 maintainer: "contact@ocamlpro.com"
 homepage: "http://lablgtk.forge.ocamlcore.org/"
 build: [
-  ["./configure" "--prefix" "%{prefix}%"]
+  ["./configure" "--prefix" "%{prefix}%" "LABLGLDIR=%{lib}%/lablgl"]
   [make "world"]
   [make "install"]
 ]
 remove: [
   ["ocamlfind" "remove" "lablgtk2"]
 ]
+patches: ["lablgldir.patch"]
 depends: ["ocamlfind"]
-depopts: ["conf-gtksourceview"]
+depopts: ["conf-gtksourceview" "lablgl"]