Also moved the #defines for linkage types into a separate header instead of
mars.h so we can #include revisions.h without having to rebuild the entire
frontend every time we update.
(I'm using revisions.h to get the LLVM revision for use in preprocessor
conditionals. It should work with LLVM release 2.5, old trunk and new trunk)
Added it to .hgignore.
This gets rid of spurious differences caused by CMake regenerating it differently.
Just run 'cmake .' to get it back in your local checkout.
Needs to be built with runtime/build-sharedlibs.sh and activated manually by
providing -defaultlib=llvmdc-runtime-shared -defaultlib=tango-cc-tango-shared
-defaultlib=tango-gc-basic-shared on llvmdc call at the moment.
To support D shared libraries in non-D code, we need to remove the main() from
libllvmdc-runtime-shared.
