RFR : 8012447 : Java CTW implementation

[Igor Ignatyev]

Hi all,

Please review patch.

DESCRIPTION
This is replacement for CompileTheWorld (CTW) written on java. Its 
purpose is to make possible the use of CTW in product builds.

More detailed description can be found in 'test/testlibrary/ctw/README'.

I also added Makefile for WhiteBox to simplify its using outside the 
jtreg-testbase.

webrev: http://cr.openjdk.java.net/~iignatyev/8012447/webrev.00/
jbs: https://jbs.oracle.com/bugs/browse/JDK-8012447
testing: jprt testlibrary/ctw
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Best regards,
Igor Ignatyev