file.c: open without gvl
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50887 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
file.c: open without gvl
lock entire process. [Bug #11060]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50887 b2dd03c8-39d4-4d8f-98ff-823fe69b080e