llvm-project

998f586c - Teach the MSVC toolchain driver to link the correct asan libraries.

Teach the MSVC toolchain driver to link the correct asan libraries. Now that the static runtime is gone the required librares are different. Note that /MD or -D_DLL causes the dynamic runtime to get linked, this is a little gross but emulates the behavior of MSVC. "Real" msvc will link the debug build of asan if you specify /DEBUG or _DEBUG, but that's not really necessary and requires building multiple configurations from the same tree.