IntelLLVM for MSVC uses the compiler for linking. The /DEF flag needs
to be passed to the linker, and the compiler does not accept it, unless
it is prefixed with `/Qoption,link,`.
Rather than explicitly set the LINK_FLAGS target property, as is done
for other MSVC frontend variants, add the .def file to the sources
for `add_library`. `add_library` will wrap the `/DEF` flag using
`CMAKE_${lang}_LINKER_WRAPPER_FLAG`. Presumably, this should work
for any MSVC front end, but leave the original test to avoid changing
a test that is working.
Signed-off-by: William R. Dieter <william.r.dieter@intel.com>
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