common.mk: probes.dmyh for nmake
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53617 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
common.mk: probes.dmyh for nmake
command, get rid of weird VPATH behavior of nmake.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53617 b2dd03c8-39d4-4d8f-98ff-823fe69b080e