Since the Busybox version bump to 1.36.0 the TestS6 fails during the
test teardown.
Backport an upstream patch fixing signal handling (SIGWINCH), see [1].
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/4322819388
[1] https://bugs.busybox.net/show_bug.cgi?id=15256
Signed-off-by: Romain Naour <romain.naour@gmail.com>
[Peter: use upstream commit as-is]
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit b6ce18b5ac)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>