Fix the ART Buildbots using the master-art manifest.

When system/core/base/include/android-base is missing, create it as a
symlink to system/core/base/include/base.

This change is very brittle and is only to unblock the ART Buildbots.
It should be a temporary solution while we come up with something

Bug: 26051370
Change-Id: Ie412fbf170e2cd260f77caaeb7af0b2e399ef3ab
1 file changed