{linux, linux-headers}: fix license hash for kernel 6.17

Buildroot commit 76d25d365bc12c34d01703f1f9a45a0e02454466 added support
for kernel 6.17 but forgot to update a license hash needed due to
upstream commit:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/LICENSES/preferred/GPL-2.0?h=v6.17&id=660470dc58624242e39b7fdc6290c81a4f810b1e

Fixes:
https://autobuild.buildroot.org/results/fbf/fbf40bda2e31ed9b9eb94dbc398123695366b776/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

linux/linux.hash

@@ -14,5 +14,5 @@ sha256  b5539243f187e3d478d76d44ae13aab83952c94b885ad889df6fa9997e16a441  linux-
 
 # Licenses hashes
 sha256  fb5a425bd3b3cd6071a3a9aff9909a859e7c1158d54d32e07658398cd67eb6a0  COPYING
-sha256  f6b78c087c3ebdf0f3c13415070dd480a3f35d8fc76f3d02180a407c1c812f79  LICENSES/preferred/GPL-2.0
+sha256  8780e78a1a737e127f25a65f6d95269bffd36158dc261114de7859b490bfc5aa  LICENSES/preferred/GPL-2.0
 sha256  8e378ab93586eb55135d3bc119cce787f7324f48394777d00c34fa3d0be3303f  LICENSES/exceptions/Linux-syscall-note