support/testing: test_clang: update to the next LTS kernel (4.19.x)
The kernel 4.16.7 curently used by the test doesn't build with host
bison (GNU Bison 3.7.5) probably due a missing fix [1] in 4.16.x branch.
Since kernel 4.16 is EOL, bump to the next LTS kernel (4.19.x) in order
to ease backport to previous Buildroot releases.
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/4114986744
[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=d59fbbd09d5d6bdf4ea1f0b4090d175e081ff421
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>
Romain Naour