CELL: mark several transient files as .gitignore

progs/demos: added new demo "fbo_firecube"

progs/glsl: added new demo "pointcoord"

src/gallium/drivers/cell/spu: added the g3d_spu executable, a Cell SPU
executable file, which seems to be occasionally built as part of the
cell driver

src/glu/sgi: added "exptmp", a byproduct of the "mklib" process that
sometimes gets deleted and sometimes not.

progs/demos/.gitignore

@@ -8,6 +8,7 @@ cubemap
 drawpix
 engine
 extfuncs.h
+fbo_firecube
 fire
 fogcoord
 fplight

progs/glsl/.gitignore

@@ -7,6 +7,7 @@ extfuncs.h
 mandelbrot
 multitex
 noise
+pointcoord
 points
 readtex.c
 readtex.h

src/gallium/drivers/cell/spu/.gitignore

@@ -0,0 +1 @@
+g3d_spu

src/glu/sgi/.gitignore

@@ -0,0 +1 @@
+exptmp