Unbreak arm.
- Remove armv6hf because it is default now.
- Merge a HotSpot fix from src/os_cpu/linux_zero/vm/os_linux_zero.cpp.
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/c6ef40024aa2
- Add an upstream patch to unbreak Zero.
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/8f58998958ca
- Extend PR209599 to cover arm platforms.