* internal.h, vm_core.h: move LIKELY/UNLIKELY/UNINITIALIZED_VAR()
  macros from vm_core.h to internal.h.
* string.c: remove dependency to "vm_core.h".
* common.mk: ditto.



git-svn-id: svn+ssh://svn.ruby-lang.org/ruby/trunk@44831 b2dd03c8-39d4-4d8f-98ff-823fe69b080e