TAG_JUMP() with TAG_FATAL (ex. rb_fatal()).
* test/ruby/test_fiber.rb (test_fatal_in_fiber): add a test for above.
* ext/-test-/fatal/extconf.rb, ext/-test-/fatal/rb_fatal.c: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38441 b2dd03c8-39d4-4d8f-98ff-823fe69b080e