* test/ruby/test_system.rb: num of asserts depended on running dir.

        * test/xsd/test_noencoding.rb: rexml + without iconv/uconv cannot
          handle euc-jp.  install iconv, uconv or xmlscan.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5257 b2dd03c8-39d4-4d8f-98ff-823fe69b080e