crash_reporter: Fix path to dbus-send

Bug: 22486906
Change-Id: If70b387bf95709719bb781719e7d0c195385be78

crash_reporter.cc

diff --git a/crash_reporter.cc b/crash_reporter.cc
index 0e45992..b4f2469 100644
--- a/crash_reporter.cc
+++ b/crash_reporter.cc
@@ -74,7 +74,7 @@
 static void CountUserCrash() {
   SendCrashMetrics(kCrashKindUser, "user");
   std::string command = StringPrintf(
-      "/usr/bin/dbus-send --type=signal --system / \"%s\" &",
+      "/system/bin/dbus-send --type=signal --system / \"%s\" &",
       kUserCrashSignal);
   // Announce through D-Bus whenever a user crash happens. This is
   // used by the metrics daemon to log active use time between