Providing --with-ocaml-libdir for ./configure. The default is the
stdlib if it's beneath --prefix, and is libdir/ocaml otherwise.

If someone has a better way than this to test whether $B is a path
within $A, I'd love to hear it:

  if test "$A" \< "$B" -a "$B" \< "${A}~"


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42532 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Makefile.config.in b/Makefile.config.in
index 778c4e8..5522232 100644
--- a/Makefile.config.in
+++ b/Makefile.config.in
@@ -261,6 +261,7 @@
 HUGE_VAL_SANITY = @HUGE_VAL_SANITY@
 
 # Bindings that we should build
-BINDINGS_TO_BUILD = @BINDINGS_TO_BUILD@
-ALL_BINDINGS = @ALL_BINDINGS@
+BINDINGS_TO_BUILD := @BINDINGS_TO_BUILD@
+ALL_BINDINGS      := @ALL_BINDINGS@
+OCAML_LIBDIR      := @OCAML_LIBDIR@