8141141: Young and Old gen PLAB stats are similar in output with -XX:+PrintPLAB
Summary: Improve PLAB statistic by adding generation, output values are now in bytes, including units, and split it into multiple messages.
Reviewed-by: brutisso, sjohanss

8141570: Fix Zero interpreter build for --disable-precompiled-headers
Summary: change to include atomic.inline.hpp and allocation.inline.hpp only in .cpp files and some build fixes from Kim to build on ubuntu without devkits
Reviewed-by: kbarrett, sgehwolf, erikj

8073013: Add detailed information about PLAB memory usage
Summary: Track and provide information about direct allocation, region end waste and failure waste for G1.
Reviewed-by: jmasa, david, ehelin, mgerdin