Pass source's info_dict to vendor's releasetools.py.

When building incremental packages, the info_dict from the source build
should be the one in use. We have done that for most of the partitions
(system and etc.), and should pass that to vendor's script as well.

Bug: 24898607
Change-Id: Ie2973d41b905637862616286663baf80df83bd88
2 files changed