[asan] properly define ASAN_LOW_MEMORY. Due to a mistake it has been always true causing redzone and quarantine sizes to be smaller than it was some time before (and out of sync with the documentation). Also make one test less greedy

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@171052 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed