tsan: fix another compiler-injected memset
newer gcc inserts memset here



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@204808 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: fix deadlock during fork
ReportRace takes the two mutexes in the opposite order



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@204809 91177308-0d34-0410-b5e6-96231b3b80d8