thread_pthread.c: STACK_GROW_DIR_DETECTION
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36487 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
thread_pthread.c: STACK_GROW_DIR_DETECTION
necessary on platforms with unknown stack direction. [Bug #6761]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36487 b2dd03c8-39d4-4d8f-98ff-823fe69b080e