tests: mark manifestfulltextcache as conditional on revlog store
This file is currently specific to the revlog store. Other stores
may not implement it. Mark it as such in test output.
Differential Revision: https://phab.mercurial-scm.org/D4395
Greg Ward, author of the original bfiles extension
Na'Tosha Bard of Unity Technologies
Fog Creek Software
Special thanks to the University of Toronto and the UCOSP program