st/mesa: also try PIPE_FORMAT_R10G10B10A2_UNORM for GL_RGB10
st/mesa: also try PIPE_FORMAT_R10G10B10A2_UNORM for GL_RGB10

Reviewed-by: Ilia Mirkin <bcbbb7aa705ec3a5fc5824c01a845186c3d62fca@alum.mit.edu>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler