Fixing the opam file to deal with compilation with presinstalled ocaml
 Changes to be committed:
	new file:   bolt/bolt.1.4/descr
	new file:   bolt/bolt.1.4/files/opam.bolt.META.patch
	new file:   bolt/bolt.1.4/files/opam.patch
	new file:   bolt/bolt.1.4/opam
	new file:   bolt/bolt.1.4/url