* insnhelper.ci: added. this function includes all functions that
vm insns need.
* common.mk: ditto.
* insnhelper.h, vm.h, vm.c: move some declaration.
* gc.h: remove GC_CHECK() macro because GC.stress is more useful.
* compile.c, iseq.c, vm_dump: ditto.
* gc.h, thread.c: move a prototype decalaration.
* debug.c, debug.h: rename some functions.
* compile.h: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12605 b2dd03c8-39d4-4d8f-98ff-823fe69b080e