meta-yocto-bsp: beaglebone: Use the uuid for the block device naming in wic image

(From meta-yocto rev: b713626dda68d4f03632da2ecbb1e073397e0c7a)

Signed-off-by: Kevin Hao <kexin.hao@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-yocto-bsp/wic/beaglebone-yocto.wks

@@ -2,5 +2,5 @@
 # long-description: Creates a partitioned SD card image for Beaglebone.
 # Boot files are located in the first vfat partition.
 
-part /boot --source bootimg-partition --ondisk mmcblk0 --fstype=vfat --label boot --active --align 4 --size 16 --sourceparams="loader=u-boot"
-part / --source rootfs --ondisk mmcblk --fstype=ext4 --label root --align 4
+part /boot --source bootimg-partition --ondisk mmcblk0 --fstype=vfat --label boot --active --align 4 --size 16 --sourceparams="loader=u-boot" --use-uuid
+part / --source rootfs --ondisk mmcblk --fstype=ext4 --label root --align 4 --use-uuid