am 8765fca2: Merge "Free the stash after its use in BBOTA v2."

          mapped_stashes.append(sr)

          if self.version == 2:

            src_str.append("%d:%s" % (sid, sr.to_string_raw()))

            # A stash will be used only once. We need to free the stash

            # immediately after the use, instead of waiting for the automatic

            # clean-up at the end. Because otherwise it may take up extra space

            # and lead to OTA failures.

            # Bug: 23119955

            free_string.append("free %d\n" % (sid,))

          else:

            assert sh in stashes

            src_str.append("%s:%s" % (sh, sr.to_string_raw()))