[tsan] force tls_model='initial-exec' for tsan's cur_thread_placeholder so that we don't depend on the compiler flags
[tsan] force tls_model='initial-exec' for tsan's cur_thread_placeholder so that we don't depend on the compiler flags

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@208536 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt