Similar to641320ce02and68bb26af63to avoid Android build errors Fixes the following building error: In file included from external/mesa/src/vulkan/util/vk_util.c:28: external/mesa/src/vulkan/util/vk_util.h:248:30: error: implicit declaration of function 'ffs' is invalid in C99 [-Werror,-Wimplicit-function-declaration] return (gl_shader_stage) (ffs((uint32_t) vk_stage) - 1); ^ 1 error generated. Fixes:06ebbde630("vulkan: Deduplicate mesa stage conversion") Acked-by: Jason Ekstrand <jason@jlekstrand.net> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10023>