selftests/livepatch: Add functions.sh to TEST_PROGS_EXTENDED

Add functions.sh to TEST_PROGS_EXTENDED so that it is installed along
with the rest of the selftests and they can be run.

Originally-by: Shuah Khan <[email protected]>
Signed-off-by: Miroslav Benes <[email protected]>
Acked-by: Joe Lawrence <[email protected]>
Signed-off-by: Petr Mladek <[email protected]>

Author: mirab

tools/testing/selftests/livepatch/Makefile

@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
+TEST_PROGS_EXTENDED := functions.sh
 TEST_PROGS := \
 	test-livepatch.sh \
 	test-callbacks.sh \