[asan] Fix possibly uninitialized coverage flag.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@224857 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] Treat \r, \n, \t as flag separators.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@224858 91177308-0d34-0410-b5e6-96231b3b80d8