Ruby

test: realpath

• test/runner.rb (src_testdir): expand real path so that
  TestGem#test_self_find_files does not fail by aliased load path when
  srcdir contains a symbolic link.
• tool/runruby.rb (srcdir): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35961 b2dd03c8-39d4-4d8f-98ff-823fe69b080e