Merge "Fix missing import."

am: 3129d2c971

Change-Id: I158729c0f950673419345a73ff8f0b728c116fd4

tools/releasetools/merge_target_files.py

@@ -80,6 +80,7 @@ import fnmatch
 import logging
 import os
 import shutil
+import subprocess
 import sys
 import zipfile