memory_status.c: system call
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56376 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
memory_status.c: system call
mach task_info system call.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56376 b2dd03c8-39d4-4d8f-98ff-823fe69b080e