[asan] Reinitialize allocator quarantine on activation.

This is covered by AddressSanitizer.UAF_* tests in asan_test
with start_deactivated=1.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@200696 91177308-0d34-0410-b5e6-96231b3b80d8