Remove glog dependency from assertion macro

Removes glog dependency.

Related to https://github.com/jubatus/jubatus/issues/746 and https://github.com/jubatus/jubatus/pull/821
Ok, how about `JUBA_CHECK`?
We already have `JUBA_MEMBER` and `JUBA_NAMED_MEMBER` here:
https://github.com/jubatus/jubatus_core/blob/master/jubatus/util/data/serialization/reflect.h#L300