[8] Request for Review: 8026052: cannot find symbol Proc

[Jason Uh]

Please review this fix. This changeset removes trailing slashes at the 
end of the test library paths in the jtreg @library tag, which can cause 
the tests to fail on Windows.

webrev: http://cr.openjdk.java.net/~juh/8026052/webrev.00/

Thanks,
Jason