WIP dispatch: Generate from Khronos XML

TODO: Test for regressions
TODO: Commit message
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>
WIP: util: Generate enum stuff
WIP glapi: Remove unused files

TODO: Test
TODO: Commit message
WIP dispatch: Rename files

TODO: Commit message
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>
WIP dispatch: Use piglit-dispatch for GLES1

TODO: Commit message
TODO: Regression test

Signed-off-by: Chad Versace <chad.versace@linux.intel.com>