hg: jdk9/sandbox/jdk: 8074859: Turn on warnings as error

[chris.hegarty at oracle.com]

Changeset: 12ecfb121147
Author:    ihse
Date:      2015-05-08 10:37 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/12ecfb121147

8074859: Turn on warnings as error
Reviewed-by: erikj

! make/CompileDemos.gmk
! make/launcher/Launcher-jdk.accessibility.gmk
! make/launcher/Launcher-jdk.pack200.gmk
! make/lib/Awt2dLibraries.gmk
! make/lib/CoreLibraries.gmk
! make/lib/Lib-jdk.crypto.ucrypto.gmk
! make/lib/NetworkingLibraries.gmk
! make/lib/NioLibraries.gmk
! make/lib/SoundLibraries.gmk