sdcard_image-sunxi.bbclass: fixing race condition with virtual/kernel (resolves #15)

Fixing a race condition with virtual/kernel:do_deploy,
which needs to deploy the image before the IMAGE_CMD_sunxi-sdimg () code is being run
as part of image:do_rootfs, otherwise the following error would sometimes occur
when compiling with multiple threads (BB_NUMBER_THREADS=2):
"[..]/deploy/images/cubieboard2/uImage-cubieboard2.bin: No such file or directory"

Fixing this by using the kernel image in sysrootfs instead.

At the same time, also adding an explicit rootfs dependency on sunxi-board-fex:do_deploy because of
"${DEPLOY_DIR_IMAGE}/fex.bin", although this never seems to pose problems in practice.
Add support for cubietruck
Add missing RPROVIDES

RPROVIDES specifies the libraries that are dynamically loaded
at runtime. This patch fixes "no package provides libGLESv2.so"
similar errors that occur when including packages like layer-management
of meta-ivi layer.
Merge pull request #16 from KristofRobot/sdcard_race_cond2

sdcard_image-sunxi.bbclass: fixing race condition with virtual/kernel (r...
Merge pull request #18 from chenbd/master

Add support for cubietruck
linux_3.4.bb: fix QA warnings/errors (resolves #14)
set the right uboot-machine
Merge pull request #21 from vonfritz/upstream-master

set the right uboot-machine
Merge pull request #20 from KristofRobot/issue14

linux_3.4.bb: fix QA warnings/errors (resolves #14)