releasetools: Unzip all files when generating image archive.

Commit 7df64c3e starts to call common.LoadInfoDict() when generating
image archive, which reads additional files under BOOT/, RECOVERY/ and
ROOT/. Unzip everything from the target_files.zip.

Bug: 132456827
Test: Run img_from_target_files.py on previously failing
      target_files.zip.
Change-Id: I22ee57c4f765bee9494478bf115b1581877401f4
diff --git a/tools/releasetools/img_from_target_files.py b/tools/releasetools/img_from_target_files.py
index 6165d96..8fb9871 100755
--- a/tools/releasetools/img_from_target_files.py
+++ b/tools/releasetools/img_from_target_files.py
@@ -180,8 +180,10 @@
     OPTIONS.input_tmp = target_files
   elif zipfile.is_zipfile(target_files):
     logger.info("Building image zip from target files zip.")
-    OPTIONS.input_tmp = common.UnzipTemp(target_files,
-                                         ["IMAGES/*", "OTA/*", "META/*"])
+    # We need files under IMAGES/, OTA/, META/ for img_from_target_files.py.
+    # However, common.LoadInfoDict() may read additional files under BOOT/,
+    # RECOVERY/ and ROOT/. So unzip everything from the target_files.zip.
+    OPTIONS.input_tmp = common.UnzipTemp(target_files)
   else:
     raise ValueError("%s is not a valid path." % target_files)