Android: amd/common: fix dependency on libmesa_nir

Android: amd/common: fix dependency on libmesa_nir

Building libmesa_amd_common fails with:

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
         ^

libmesa_amd_common now depends on libmesa_nir, so add it as a dependency
and export the necessary directories.

Fixes: 224cf29 "radv/ac: add initial pre-pass for shader info gathering"
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Chih-Wei Huang <cwhuang@linux.org.tw>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>