build: ocamlmklib on Windows expect a Windows-style path, not a UNIX one.

(Patch by Adrien Nader!)

Rev 14168 (build: replace ocamlcomp*.sh.) broke "make world" (but
surprisingly, not "world.opt") because the argument to ocamlmklib's -ocamlc
has to be a Windows path, i.e. C:\...\ocamlc. Instead it gave a UNIX one,
i.e. /home/foo/ocaml/ocamlc.

Call cygpath in otherlibs/Makefile.nt to fix that.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14175 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
build: typo on config/Makefile.mingw64, msvc and msvc64.

(Patch by Adrien Nader!)

While trying to come up with the previous commit, I noticed that the
various Windows config files had diverged: all but config/Makefile.mingw
were lacking a '%' in a pattern and this prevents the pattern from matching
anything.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14176 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02