UML didn't have a subtarget defined.
While this compiled fine, the patch caused funny filenames
for the generated files to appear:
- "openwrt-uml--vmlinux"
- "openwrt-uml--squashfs.img"
- "openwrt-uml--ext4.img"
- ...
since "generic" is implied anyway, let's just set it.
Fixes: d997477775 ("treewide: remove implicit SUBTARGET")
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/15713
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
