u-boot: Add UBOOT_LOCALVERSION to control version string
* Add a variable called UBOOT_LOCALVERSION which when set will
place a version string in the .scmversion file of the u-boot
sources. This string will be picked up by the u-boot Makefile
and will be appended to the u-boot version. This is done to
make it easier to identify what revision of the u-boot sources
are being run. For example you can use a setting like the
following to add the short commit id to the u-boot version
string:
