tracing: Update tracing branch url

ftrace and perf events now use the same development branch.
Don't show a stale branch to developers.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
1 file changed