Start wrapping OpenGL, and print periodic FPS value to stdout.

Start wrapping OpenGL, and print periodic FPS value to stdout.

In addition to the fips binary, we now also compile a libfips.so library
and LD_PRELOAD that before executing the program specified on the command-
line.

The libfips.so library wraps OpenGL calls of interest for purpose of
instrumentation. So far, the only call wrapped is glXSwapBuffers and
the only instrumentation is to compute and print out a frames-per-second
value every 60 frames.