Sync from jdk8/jdk8 to ppc-aix-port/stage this week

[Vladimir Kozlov]

I'm doing the sync today. It merges changes which removed old build 
system. I have to manually merge next files:

jdk/make/CompileLaunchers.gmk
jdk/test/java/lang/ProcessBuilder/Basic.java

and rebuild:
  generated-configure.sh

It passed JPRT control builds and testing. Please, verify that it works 
for you.

Merged Hotspot is pushed thorough JPRT, so it will be merged later.

Thanks,
Vladimir