Adds Swifty's frame profiling code. In order to activate it, use the -profile_frame_time commandline parameter. ATTENTION PLATFORM MAINTAINERS:

This adds a new file to the source tree named profiling.cpp, add this to the respective project files (I've already done it for the various MSVS projects)

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9806 387891d4-d844-0410-90c0-e4c51a9137d3