[ASan] Simplify exception/longjmp tests even further

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@213646 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan/Win] Add handling of C++ exceptions to the RTL

Also add a longjmp() test

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@213649 91177308-0d34-0410-b5e6-96231b3b80d8