[ASan] Minor cleanup: remove a couple of unused variables.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182915 91177308-0d34-0410-b5e6-96231b3b80d8
[sanitizer] introduce LargeMmapAllocator::GetBlockBeginFastSingleThreaded, required for LeakSanitizer to work faster. Also fix lint.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182917 91177308-0d34-0410-b5e6-96231b3b80d8
Fix #if guards in sanitizer_common code

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182918 91177308-0d34-0410-b5e6-96231b3b80d8
[asan] workaround for the quemu bug in proc maps (http://code.google.com/p/address-sanitizer/issues/detail?id=160)

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@182922 91177308-0d34-0410-b5e6-96231b3b80d8