[CMake] Avoid accidental C++ standard library dependency in sanitizers

[CMake] Avoid accidental C++ standard library dependency in sanitizers

While sanitizers don't use C++ standard library, we could still end
up accidentally including or linking it just by the virtue of using
the C++ compiler. Pass -nostdinc++ and -nostdlib++ to avoid these
accidental dependencies.

Reviewed By: smeenai, vitalybuka

Differential Revision: https://reviews.llvm.org/D88922