Fixes following building errors due to missing include paths:
external/mesa/src/amd/common/ac_shader_info.c:23:10: fatal error: 'nir/nir.h' file not found
^
external/mesa/src/compiler/nir/nir.h:48:10: fatal error: 'nir_opcodes.h' file not found
^
Fixes: 224cf29 "radv/ac: add initial pre-pass for shader info gathering"
Acked-by: Dave Airlie <Airlied@redhat.com>
Acked-by: Emil Velikov <emil.velikov@collabora.com>