add shell scripts for non-rsync repo

scripts/homebrew.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+if [ ! -d "$TUNASYNC_WORKING_DIR" ]; then
+	echo "Directory not exists, fail"
+	exit 1	
+fi
+
+function update_homebrew_git() {
+	cd $TUNASYNC_WORKING_DIR
+	git remote -v update
+}
+
+update_homebrew_git