Create oc binary for Orange Mini

[rfratto]

The oc binary will take in a series of .or files and produce an executable. It will link to libc by default, but can link to no other libraries. Using orange libraries with oc requires passing in all of their source files.

The code is simply a frontend for the set of libraries (libast, libparse, libanalysis, libgenerate, libtranslate).

The full version of Orange will use an orange binary and not have any of these limitations.