cmake HAVE_CAP_RIGHTS_LIMIT examples

CTSRD-CHERI/cheribsd contrib/tcpdump/CMakeLists.txt :1021 

check_function_exists(cap_rights_limit HAVE_CAP_RIGHTS_LIMIT)

CTSRD-CHERI/cheribsd contrib/tcpdump/CMakeLists.txt :1045 

endif(HAVE_CAP_ENTER AND HAVE_CAP_RIGHTS_LIMIT AND
              HAVE_CAP_IOCTLS_LIMIT AND HAVE_OPENAT)