Our u-boot-nm.inc was just a copy of an outdated u-boot.inc.
I now changed the u-boot-nm.inc file to be a common configuration file
for our u-boot recipes.
BugzID: 75187
Signed-off-by: Lucien Mueller <lucien.mueller@netmodule.com>
After changing the distro config to allow reproducible builds, a side
effect was that the date printed during uboot startup was 1 Jan 1970.
In order to get the real build date in uboot, we must unset the
SOURCE_DATE_EPOCH variable.
BugzID: 67738