cso: add CSO_BITS_ALL_SHADERS
cso: add CSO_BITS_ALL_SHADERS

For saving/restoring all shader stages.

Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler