Bug 1659806 - Set -fcrash-diagnostics-dir on Android CI builds r=geckoview-reviewers,froydnj,agi

This will make clang put reproducers for compiler crashes into the artifacts upload directory. We've been doing this on other platforms for a while but it seems Android was left out.

Differential Revision: https://phabricator.services.mozilla.com/D87482

mobile/android/config/mozconfigs/common

@@ -28,6 +28,8 @@ if [ -z "$NO_NDK" -a -z "$USE_ARTIFACT" ]; then
     # We use our own clang instead of the NDK's clang.
     CC="$MOZ_FETCHES_DIR/clang/bin/clang"
     CXX="$MOZ_FETCHES_DIR/clang/bin/clang++"
+    CFLAGS="$CFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
+    CXXFLAGS="$CXXFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
     ac_add_options --with-android-ndk="$MOZ_FETCHES_DIR/android-ndk"
     # Make sure that any host binaries we build use whatever libraries clang
     # linked against, rather than what's on the system.