selftests: ftrace: Hide ftracetest logs from git

Hide ftracetest result log directory from git.

Link: http://lkml.kernel.org/r/147928404640.22982.13173364949326289032.stgit@devbox

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
diff --git a/tools/testing/selftests/ftrace/.gitignore b/tools/testing/selftests/ftrace/.gitignore
new file mode 100644
index 0000000..98d8a5a6
--- /dev/null
+++ b/tools/testing/selftests/ftrace/.gitignore
@@ -0,0 +1 @@
+logs