selftest/lkdtm: Don't pollute 'git status'

Commit 46d1a0f03d ("selftests/lkdtm: Add tests for LKDTM targets")
added generation of lkdtm test scripts.

Ignore those generated scripts when performing 'git status'

Fixes: 46d1a0f03d ("selftests/lkdtm: Add tests for LKDTM targets")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

.gitignore

@@ -100,6 +100,10 @@ modules.order
 /include/ksym/
 /arch/*/include/generated/
 
+# Generated lkdtm tests
+/tools/testing/selftests/lkdtm/*.sh
+!/tools/testing/selftests/lkdtm/run.sh
+
 # stgit generated dirs
 patches-*