Clang/ASM: populate MSVC runtime library abstraction table
!3211 (merged) overlooked populating the runtime library selection flags for ASM with clang-cl in MSVC compatibility mode. There is no flag that needs to be passed, but the value is expected to be available by the generators. We simply provide the empty string to appease the generators without emitting any additional flags.
Fixes: #23048 (closed)
Topic-rename: clang-cl-asm-msvc-runtime
Edited by Brad King