nodejs: fix typo for arm predefined macro used for atomicops

Add patch to fix typo for arm predefined macrco in (__ARM_ARCH_6KZ__
vs. __ARM_ARCH_6ZK__) in atomicops_internals_arm_gcc.h

Fixes #8391: Node.js 0.12.7 fails to build on raspberry_pi defconfig

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>