Search for config for ping/pong next to binaries.

Change-Id: I83cb8a5f4b7db05db56b62f0bf36f0f7041919c7
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/aos/events/ping.cc b/aos/events/ping.cc
index a759a8f..9333b61 100644
--- a/aos/events/ping.cc
+++ b/aos/events/ping.cc
@@ -6,7 +6,7 @@
 #include "gflags/gflags.h"
 #include "glog/logging.h"
 
-DEFINE_string(config, "aos/events/pingpong_config.json", "Path to the config.");
+DEFINE_string(config, "pingpong_config.json", "Path to the config.");
 
 int main(int argc, char **argv) {
   aos::InitGoogle(&argc, &argv);
diff --git a/aos/events/pong.cc b/aos/events/pong.cc
index 2f5a0a5..59ddf5d 100644
--- a/aos/events/pong.cc
+++ b/aos/events/pong.cc
@@ -6,7 +6,7 @@
 #include "aos/init.h"
 #include "glog/logging.h"
 
-DEFINE_string(config, "aos/events/pingpong_config.json", "Path to the config.");
+DEFINE_string(config, "pingpong_config.json", "Path to the config.");
 
 int main(int argc, char **argv) {
   aos::InitGoogle(&argc, &argv);