android: Fix zink build failure
android: Fix zink build failure
Otherwise we run into following build error on Android:
ld.lld: error: undefined symbol: galliumvk_driver_extensions
Fixes: cfa955ed78be ("glx/egl: fix LIBGL_KOPPER_DISABLE")
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>