intel/aubinator: fix 32bit shift overflow warning
intel/aubinator: fix 32bit shift overflow warning

Doesn't look like this can work on 32bit, just rids of annoying
warning.

Signed-off-by: Grazvydas Ignotas <eac34e836c3bc120048c86fead6dd0257a872a9e@gmail.com>
Reviewed-by: Eduardo Lima Mitev <86e6f0c9eba14994f25948ad50c226b324e9fa92@igalia.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler