android: fix build failure with libbacktrace

because 848e7b94 commit cause.it  modify u_debug_stack_android.cpp
location from src/gallium/auxiliary/util to src/util but Android.mk
not modify

Fixes: 848e7b94 ("Move stack debug functions to src/util")
Signed-off-by: cheyang <cheyang@bytedance.com>
Acked-by: Tapani Pälli <tapani.palli@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7851>
(cherry picked from commit 83d1e2efd0e89191da80b62c048a9b7a471a86a3)
2 files changed