configure.in: quote defun names
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47226 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: quote defun names
(RUBY_CHECK_BUILTIN_SETJMP, RUBY_SETJMP_TYPE),
(RUBY_STACK_GROW_DIRECTION): quote defun names, for some
versions of autoconf possibly. [ruby-core:64473] [Bug #10156]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47226 b2dd03c8-39d4-4d8f-98ff-823fe69b080e