tsan: do not check for intersecting memory accesses in Go (all accesses are 1 byte)


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174046 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: switch to explicit thread contexts in Go (instead of monotonic goroutine ids)


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@174047 91177308-0d34-0410-b5e6-96231b3b80d8