test/runtests.sh: Fix shellcheck directive for old versions
The sourced file cannot be guaranteed to be present, and old shellcheck
versions do not take into account the annotated suppression. Instead
unconditionally redirect it to /dev/null.
@@ -17,7 +17,7 @@ DO_KMSG="1"
# Include config.local if exists and check TEST_FILES for valid devices
if [ -f "$TEST_DIR/config.local" ]; then
- # shellcheck disable=SC1091
+ # shellcheck source=/dev/null disable=SC1091
. "$TEST_DIR/config.local"
for dev in $TEST_FILES; do
if [ ! -e "$dev" ]; then
