Fix for framework includes (-F) on Darwin/MacOSX. Previously they
were treated as auxillary arguments and reordered with respect to
other includes (-I), breaking compilation commands.

Also modified CLANG_INCLUDEPATH to stringify it as needed, in source
code, as opposed to trying to escape quote it (which doesn't work
when you attempt to run rtags on itself ;)

Moved rct to my own fork.
Fixed macro expansion of CLANG_INCLUDEPATH
cl-lib doesn't define 'defun*', use alias