RFR(XS) : 8186095 : upgrade to jtreg 4.2 b08

[mandy chung]

On 8/10/17 9:02 PM, Igor Ignatyev wrote:
> http://cr.openjdk.java.net/~iignatyev//8186095/webrev.00/index.html
hotspot/test/runtime/Metaspace/FragmentMetaspaceSimple.java

26 * @library /test/lib classes
   27  * @build test.Empty
28 * @run driver ClassFileInstaller test.Empty 
jdk.test.lib.compiler.CompilerUtils is easy to use. I would suggest to 
convert these implicit compile+copy steps into an explicit setup step to 
compile ${test.src}/test/Empty.java into the destination directory. It'd 
be easy to read and understand. Bumping up jtreg version is fine. Mandy