* app/composite/: Regenerated installers and testers.

* app/composite/make-install.py: increased tests of pixels to 1024*1024+1

* app/composite/gimp-composite-mmx.c (gimp_composite_overlay_rgba8_rgba8_rgba_mmx):
  Backed out of the current build.  Although the unit tests all
  pass, the emperical evidence is that something is wrong with it.