Intel/Fortran: Avoid recording warning 5117 lines in CMakeError.log

This seemed the least code impactful change to avoid appending 200 kilobytes of vestigial text to every project's CMakeError.log, which happens on Windows with Intel/IntelLLVM on Fortran projects. For Intel, it's been happening for several years at least.

Probably unlikely another compiler would emit exactly that warning ID, so take it as a sign it's Intel compiler and don't log to disk.