Add a filter to waf cpplint.
Add a filter to waf cpplint.

cpplint's runtime/int generates warnings not to use (unsigned) long (long) int directly,
but we have to use them in some situation.
For example, wrapping __builtin_popcountl or __builtin_popcountll.

rimms/jubatus_core,gintenlabo/jubatus_core,rimms/jubatus_core,rimms/jubatus_core,gintenlabo/jubatus_core,gintenlabo/jubatus_core,rimms/jubatus_core,gintenlabo/jubatus_core