ocaml: add .aug as a new extension

augeas uses .aug as extension for lense definition.
The syntax of .aug is a subset of ocaml.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
ocaml: add caml as a new alias

"caml" is the name of another emacs major mode
for editing ocaml file.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>