Test: test/sun/nio/cs

[Xueming Shen]

Alan,

Can you help review?

(1)TestUTF8
    This one is no longer reproducible, it passes on all platforms 
during the last several jprt runs.

(2)FindDecoderBugs
    The only possible cause of its failure on a particular platform is 
timeout, this test takes long cpu time
    on slow machine. I tweak it a little, it runs about 30% faster now. 
It passes the last several jprt runs
    on all platforms.

(3) TestX11CNS
     This test is not really necessary (it is useful when migration to 
new implementation) but I modified
      it to run and pass anyway.

http://cr.openjdk.java.net/~sherman/test_cs/webrev/

Thanks,
Sherman