Add bad-speed.sh test script to fetch-gnu.sh (#10077)

Author: ChrisDryden

util/fetch-gnu.sh

@@ -9,5 +9,6 @@ curl -L ${repo}/raw/refs/heads/master/tests/mkdir/writable-under-readonly.sh > t
 curl -L ${repo}/raw/refs/heads/master/tests/cp/cp-mv-enotsup-xattr.sh > tests/cp/cp-mv-enotsup-xattr.sh #spell-checker:disable-line
 curl -L ${repo}/raw/refs/heads/master/tests/cp/nfs-removal-race.sh > tests/cp/nfs-removal-race.sh
 curl -L ${repo}/raw/refs/heads/master/tests/csplit/csplit-io-err.sh > tests/csplit/csplit-io-err.sh
+curl -L ${repo}/raw/refs/heads/master/tests/stty/bad-speed.sh > tests/stty/bad-speed.sh
 # Avoid incorrect PASS
 curl -L ${repo}/raw/refs/heads/master/tests/runcon/runcon-compute.sh > tests/runcon/runcon-compute.sh