WebGL conformance test

- current version is 1.0.0 released 04/06/2011 at revision 14463
  https://cvs.khronos.org/svn/repos/registry/trunk/public/webgl/sdk/tests/

To update test binaries:

0) find revision number on page above (here 14463)
1) cd scripts
2) ./make_tarball 14463
3) update revision number in graphics_WebGLConformance.py (tarball and patch)
4) rename patch version and check if it is still working, otherwise manual three way merge
5) copy webgl-conformance-1.0.0.tar.bz2 to production location so it appears at
   http://commondatastorage.googleapis.com/chromeos-localmirror/distfiles/