configure.in: no __builtin_setjmp on x64-mingw
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45537 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: no __builtin_setjmp on x64-mingw
x64-mingw, which causes SEGV with callcc.
[ruby-core:61887] [Bug #9710]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45537 b2dd03c8-39d4-4d8f-98ff-823fe69b080e