* gc.c (objspace_malloc_increase): enable lazy sweep on GC by malloc()
  (malloc_increase) to make GC incrementally.
  This change can increase memory consumption. Report us if you find
  any problem.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48603 b2dd03c8-39d4-4d8f-98ff-823fe69b080e