RFR: 8072910: Move the g1EvacFailure.hpp implementation to g1EvacFailure.cpp

[Stefan Karlsson]

Hi all,

Please, review this patch to move the implementation of 
g1EvacFailure.hpp into a new cpp file. This helps reducing our include 
dependencies in the header files.

http://cr.openjdk.java.net/~stefank/8072910/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8072910

Thanks,
StefanK