insane.bbclass: fix elf.arch not matching error for x32 kernel
For x32 the user space is 32bit and the kernel is 64bit.
So the elf.arch for vmlinuz is x86_64 and not x86. This commit
fixes this QA error thrown for x32 kernel.
| ERROR: QA Issue: Architecture did not match (62 to 3) on
/work/qemux86_64-poky-linux-gnux32/linux-korg-3.1+git1+
e2bf8464ddbf5da24d3d320cded5691828a91a0b-r1/packages-split/kernel-vmlinux/boot/
vmlinux-3.1.0-yocto-standard-01628-ge2bf846
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
