st/mesa: disable depth/stencil/alpha tests in PBO upload
st/mesa: disable depth/stencil/alpha tests in PBO upload

Noticed by Brian Paul.

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

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler