Assign a lower Locklevel for Mutexes used in QuasiAtomic operations.
This fixes the CompilerDriverTest on MIPS. The test was failing when
Transaction::Abort() acquired intern_table_lock_ and log_lock_
and subsequently performed QuasiAtomic operations.

Change-Id: I9fcda51221f1f298bcb5dd0e10019bd2034ab8ae
2 files changed