ASAN activate/deactive controls thread_local_quarantine_size_kb option.

Summary:
Bypass quarantine altogether when quarantine size is set ot zero.
Also, relax atomic load/store of quarantine parameters, the
release/acquire semantics is an overkill here.

Reviewers: eugenis

Subscribers: kubabrecka, llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D28586

llvm-svn: 291791