More ignored programs merged back from master

Some more entries in progs/*/.gitignore that were in master.

progs/demos/.gitignore

@@ -1,17 +1,25 @@
 .cvsignore
 arbfplight
+arbfslight
 arbocclude
 bounce
 clearspd
+copypix
 cubemap
 drawpix
+engine
+extfuncs.h
 fire
+fogcoord
 fplight
+fslight
 gamma
+gearbox
 gears
 geartrain
 glinfo
 gloss
+glslnoise
 gltestperf
 glutfx
 ipers
@@ -37,6 +45,7 @@ singlebuffer
 spectex
 spriteblast
 stex3d
+streaming_rect
 teapot
 terrain
 tessdemo
@@ -44,7 +53,10 @@ texcyl
 texdown
 texenv
 texobj
+trackball.c
+trackball.h
 trispd
 tunnel
 tunnel2
+vao_demo
 winpos

progs/glsl/.gitignore

@@ -1,10 +1,13 @@
+bitmap
 brick
 bump
 deriv
 extfuncs.h
 mandelbrot
 noise
+points
 readtex.c
 readtex.h
 texdemo1
+trirast
 toyball

progs/xdemos/.gitignore

@@ -1,18 +1,23 @@
+corender
 glthreads
+glxcontexts
 glxdemo
 glxgears
+glxgears_fbconfig
 glxheads
 glxinfo
 glxpbdemo
 glxpixmap
+glxsnoop
 glxswapcontrol
 manywin
 offset
-pbinfo
 overlay
 pbdemo
 pbinfo
+texture_from_pixmap
 wincopy
 xdemo
 xfont
 xrotfontdemo
+yuvrect_client