Minor enhancements for sanitizer_common build rules

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190786 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Check that getSymbolizer() is defined. Turn magic mapping constants into named variables

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190787 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Split ASan unit tests into two different binaries:

(1) instrumented, i.e. compiled and linked with -fsanitize=address
(2) not instrumented, compiled w/o -fsanitize=address and linked with ASan runtime statically.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@190788 91177308-0d34-0410-b5e6-96231b3b80d8