[libcxx] [test] Link against msvcprt as C++ ABI library in tests

This matches what we link the library itself against (set in
CMakeLists.txt). When testing a static library version of libc++,
this is needed for essentially every test due to libc++ object files
requiring it.

Also with libc++ built as a DLL, some tests directly call functions that
are provided by msvcprt (such as std::set_new_handler), thus this fixes
a number of tests in that configuration too.

Differential Revision: https://reviews.llvm.org/D99263