openjdk-7-25b30: Forward port ppc patches

openjdk-7 update needed this patch to be reworked

Signed-off-by: Khem Raj <raj.khem@gmail.com>
openjdk-7-release-25b30.inc: move nio patch to main section.

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
openjdk-7-release-25b30.inc: add patch to fix hotstop build

When using --enable-zero=no the build will fail without this patch.

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>