* common.mk (COMMONOBJS): added strftime.$(OBJEXT).
* time.c (time_strftime): do not use strftime(3). supported
%L(millisecond) and %N(nanosecond).
* test/ruby/test_time.rb: added tests for %L and %N.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18731 b2dd03c8-39d4-4d8f-98ff-823fe69b080e