Update aos_config path in aos_timing_report_streamer

/app/aos_config.json isn't proper.  We should use the same search path
logic here as everywhere else, look next to the binary first.

Change-Id: I9c85d3a36d7189009fb5bf780cce959595fd5082
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/aos/events/aos_timing_report_streamer.cc b/aos/events/aos_timing_report_streamer.cc
index ee5efde..35a78b9 100644
--- a/aos/events/aos_timing_report_streamer.cc
+++ b/aos/events/aos_timing_report_streamer.cc
@@ -5,7 +5,7 @@
 #include "aos/json_to_flatbuffer.h"
 #include "gflags/gflags.h"
 
-DEFINE_string(config, "/app/aos_config.json", "The path to the config to use.");
+DEFINE_string(config, "aos_config.json", "The path to the config to use.");
 DEFINE_string(application, "",
               "Application filter to use. Empty for no filter.");
 DEFINE_bool(stream, true, "Stream out all the timing reports that we receive.");