* compile.c, insns.def, test/ruby/test_rubyvm.rb, vm.c, vm_core.h,
  vm_insnhelper.c, vm_insnhelper.h, vm_method.c: Rename method_serial
  to global_method_state and constant_serial to global_constant_state
  after discussion with ko1.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44097 b2dd03c8-39d4-4d8f-98ff-823fe69b080e