Makefile.sub: sitearch

* win32/Makefile.sub (config.status): site and vendor directories
  should use sitearch, not arch.  [ruby-dev:46964] [Bug #7823]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39201 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: sitearch

* configure.in (rubysitearchprefix): sitearchdir and vendorarchdir
  should use sitearch, not arch.  [ruby-dev:46964] [Bug #7823]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39202 b2dd03c8-39d4-4d8f-98ff-823fe69b080e