InstallRequiredSystemLibraries: Check for existence of mfcm dlls

Christof Krügerrequested to merge
christof.krueger/cmake:patch-1 into master

Check for mfcm${v}.dll and mfcm${v}d.dll before using them.

Fixes: #17913 (closed)
Topic-rename: InstallRequiredSystemLibraries-mfcm

Edited by Brad King

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