Use tcc and the emitted C code from s_fragprog_to_c.c to dynamically compile

Use tcc and the emitted C code from s_fragprog_to_c.c to dynamically compile
and execute fragment programs.  Very limited and experimental, but works
well enough to run arbfplight.c.

	http://fabrice.bellard.free.fr/tcc/

Compile with 'make linux-tcc', being sure to make clean first.