[Sanitizer] Make Quarantine::Init slightly safer.
[Sanitizer] Make Quarantine::Init slightly safer.

ASan Quarantine can be reinitialized at activation/deactivation.
Make max_size_/min_size_ atomic.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@224613 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