toolchain: kernel-headers: fix check target for external Git trees
Executing following command currently fails:
$ make toolchain/kernel-headers/{download,check} V=sc FIXUP=1
...
include/kernel-version.mk:11: *** Missing kernel version/hash file for . Please create include/kernel-. Stop.
So lets fix it by adding the necessary missing KERNEL_PATCHVER variable.
That additional kernel-build.mk include is needed to add another set of
missing variables:
$ make toolchain/kernel-headers/{download,check} V=sc FIXUP=1
...
Makefile:115: *** ERROR: Unknown pack format for file tmp/dl/. Stop.
Fixes:
0765466a42f4 ("kernel: split kernel version to dedicated files")
Signed-off-by: Petr Štetiar <ynezz@true.cz>
(cherry picked from commit
6b7f1ffbad732c5e1818f9387c02dda109c2748b)