Fix Android native Git child exit handling so committed levels validate and Git calls avoid SIGSEGV status 139

AndroidProjectTooling.sh

@@ -450,7 +450,7 @@ build_android_git_for_abi() {
   local output_dir="$ANDROID_JNI_DIR/$abi"
   local output_binary="$output_dir/libgit.so"
   local stamp="$output_dir/.source-fingerprint"
-  local fingerprint="$3:android:$abi:$cc:$ANDROID_API"
+  local fingerprint="$3:android:$abi:$cc:$ANDROID_API:githug-embedded-main"
 
   require_path "$ANDROID_TOOLBIN/$cc"
 
@@ -470,6 +470,7 @@ build_android_git_for_abi() {
     NO_PTHREADS=YesPlease \
     NO_LIBGEN_H=YesPlease \
     HAVE_DEV_TTY=YesPlease \
+    CFLAGS_APPEND=-DGITHUG_EMBEDDED_MAIN \
     CC="$cc" \
     AR=llvm-ar \
     RANLIB=llvm-ranlib \