Bug 861395 - Part 1: Log the `cause` exception that we report to Socorro. r=kats

mobile/android/base/GeckoAppShell.java

@@ -174,9 +174,6 @@ public class GeckoAppShell
         Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
             @Override
             public void uncaughtException(Thread thread, Throwable e) {
-                Log.e(LOGTAG, ">>> REPORTING UNCAUGHT EXCEPTION FROM THREAD "
-                              + thread.getId() + " (\"" + thread.getName() + "\")", e);
-
                 // If the uncaught exception was rethrown, walk the exception `cause` chain to find
                 // the original exception so Socorro can correctly collate related crash reports.
                 Throwable cause;
@@ -184,6 +181,9 @@ public class GeckoAppShell
                     e = cause;
                 }
 
+                Log.e(LOGTAG, ">>> REPORTING UNCAUGHT EXCEPTION FROM THREAD "
+                              + thread.getId() + " (\"" + thread.getName() + "\")", e);
+
                 if (e instanceof java.lang.OutOfMemoryError) {
                     SharedPreferences prefs =
                         GeckoApp.mAppContext.getSharedPreferences(GeckoApp.PREFS_NAME, 0);