* Makefile.in (RBCONFIG): Moved from common.mk in order to use the
  variable in Makefile.in.

* win32/Makefie.sub (RBCONFIG): Ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38694 b2dd03c8-39d4-4d8f-98ff-823fe69b080e