"git@repo.buzztime.com:halo/art.git" did not exist on "f3d874c60ee3ada19ce26a5c4e532312b6f3a9e9"
Avoid race in single thread suspension.
Ian Rogers authored
Don't allow more than one concurrent single thread suspension to avoid
potential cycles and deadlocks where threads try to suspend each other.
Bug: 16364458, 16354227

Change-Id: I907f1d5591a6aa5c241d37d6b4a34f968f98df77
f3d874c6