Add check for sensible CMAKE settings to ports-mgmt/portlint
If a port sets CMAKE variables (CMAKE_ARGS, or the option helpers
like foo_CMAKE_BOOL) then it should have USES=cmake; otherwise
those variables don't make any sense.
This is the slightly simplified version of the patch: there
really shouldn't be options that switch (meta-)build systems.
PORTREVISION bumped because I'm not sure what the versioning
scheme is for portlint.