[ASan] Introduce a top-level target to collect all ASan runtimes and deps

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@194696 91177308-0d34-0410-b5e6-96231b3b80d8
[UBSan] Make sure ASan and UBSan interact properly by running each test from UBSan test suite with and without ASan

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@194698 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] A test for r194697.


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@194699 91177308-0d34-0410-b5e6-96231b3b80d8