[yocto] Some nightly build failures on autobuilder (on commit b9a97e07, namely, "Revert part of the unpack change...")

[Cui, Dexuan]

1)	Building qemumips meta-toolchain-sdk failed: 
http://autobuilder.pokylinux.org:8010/builders/nightly-external/builds/35/steps/shell_26/logs/stdio
eglibc's do_package failed: 
ERROR: Error executing a python function in /srv/home/pokybuild/poky-slave/nightly-external/build/meta/recipes-core/eglibc/eglibc_2.12.bb:
CopyFailed: Command tar -cf - -C /srv/home/pokybuild/poky-slave/nightly-external/build/build/tmp/work/mips-poky-linux/eglibc-2.12-r13/sstate-install-package///package -ps . | tar -xf - -C /srv/home/pokybuild/poky-slave/nightly-external/build/build/tmp/work/mips-poky-linux/eglibc-2.12-r13/package failed with return value 2

Looks it's related to Mark's recent commit 3e6d91ec, but what's odd is: qemumips failed here while qemux86 and qemuarm are ok... BTW: MACHINE routerstationpro and atom-pc also have the same failure as qemumips.

2)	on mpc, linux-libc-headers-yocto-2.6.37+git do_install failed:
http://autobuilder.pokylinux.org:8010/builders/nightly-external/builds/35/steps/shell_19/logs/stdio
| install: cannot create regular file `/srv/home/pokybuild/poky-slave/nightly-external/build/build/tmp/work/ppc603e-poky-linux/linux-libc-headers-yocto-2.6.37+git-1+343c06b25b221aa7f7019aee83b2d976041fddce_1+343c06b25b221aa7f7019aee83b2d976041fddce-r2/image/boot/devicetree-': No such file or directory
NOTE: package linux-libc-headers-yocto-2.6.37+git-1+343c06b25b221aa7f7019aee83b2d976041fddce

3)	ememlow do_rootfs failed:
http://autobuilder.pokylinux.org:8010/builders/nightly-internal/builds/48/steps/shell_9/logs/stdio
| error: Failed dependencies:
| 	keymaps is needed by task-poky-boot-1.0-r7.emenlow
| 	base-files is needed by task-poky-boot-1.0-r7.emenlow
| 	task-base-wifi is needed by task-base-extended-1.0-r69.emenlow
| 	task-base-bluetooth is needed by task-base-extended-1.0-r69.emenlow
| 	task-base is needed by task-base-extended-1.0-r69.emenlow
| ...

First I'm trying to reproduce issue 1 now. Mark, do you have any quick thought?  :-)


Thanks,
-- Dexuan