Fixes the following building error in Android:
FAILED: ninja: 'external/mesa/src/amd/vulkan/radv_entrypoints_gen.py',
needed by 'out/target/product/x86_64/gen/STATIC_LIBRARIES/libmesa_radv_common_intermediates/radv_entrypoints.c',
missing and no known rule to make it
Fixes: 23f8ca0c9d ("radv: port to using common dispatch code.")
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8899>