RFR: JDK-8141543 Propagate --disable-warnings-as-errors to hotspot

Thu Nov 5 15:43:25 UTC 2015

Unfortunately, the --disable-warnings-as-errors flag only operates on 
the build-infra code, and does not propagate to the Hotspot build system.

This is unfortunate, and also very confusing for users who think they 
have disabled warnings as errors, only to get an error in the hotspot 
build instead.

We should set the correct value for hotspot makefiles from configure as 
well.

Bug: https://bugs.openjdk.java.net/browse/JDK-8141543
WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8141543-propagate-disable-warnings-as-errors-to-hotspot/webrev.01

/Magnus