common.mk: use RUNRUBY for test-sample
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43129 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
common.mk: use RUNRUBY for test-sample
runtime library path and run the built ruby. [Bug #8971]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43129 b2dd03c8-39d4-4d8f-98ff-823fe69b080e