RFR: JDK-8175054: Move new TestPrintMdo.java to hotspot/test directory

[Jini George]

Hi,

Could I pls get a quick review for the following minor change to correct 
an incorrect push wrt the file path of a new test case added ?

Bug: https://bugs.openjdk.java.net/browse/JDK-8175054
Webrev: http://cr.openjdk.java.net/~jgeorge/8175054/webrev/

Thanks,
Jini.