test-configs.yaml: Add fragment for ftrace selftests

The ftrace selftests can be a bit slow to run and unfortunately need the
kselftest build configuration which is difficult to deploy but they are
very useful.

Signed-off-by: Mark Brown <[email protected]>

Author: broonie

config/core/test-configs.yaml

@@ -333,6 +333,12 @@ test_plans:
       kselftest_collections: "filesystems"
     filters: *kselftest_no_fragment
 
+  kselftest-ftrace:
+    <<: *kselftest
+    params:
+      job_timeout: '20'
+      kselftest_collections: "ftrace"
+
   kselftest-futex:
     <<: *kselftest
     params: