Use a unique path name for each find_library

[kgerheiser]

The paths are saved in the cache and are not overwritten by subsequent
calls to find_library using the same lib_path name

[climbfuji]

Thanks for doing this. Sorry that I am late to the party, had a visitor arriving from Germany today. These changes don't affect the umbrella build, but nonetheless we should update the cmake submodule pointers in the various submodules of NCEPLIBS that use CMakeModules, in NCEPLIBS itself and in NCEPLIBS-external before we create the next tag. This way Dusan can test/use this in simple-ufs. Should I do that tomorrow (I've got copy & paste templates for updating cmake submodule pointers by now)?

[DusanJovic-NOAA]

@climbfuji Yes, please. Update all NCEPLIBS public branches to point to this commit. And UFS_UTILS and EMC_post.

[climbfuji]

Done, also did the NCEPLIBS umbrella repo. Will do NCEPLIBS-external later (together with an update of the documentation).