Use abort instead of exit.

git-svn-id: https://google-glog.googlecode.com/svn/trunk@9 eb4d4688-79bd-11dd-afb4-1d65580434c0

src/utilities.cc

@@ -94,7 +94,7 @@ static void DumpStackTrace(int skip_count, DebugWriter *writerfn, void *arg) {
 
 static void DumpStackTraceAndExit() {
   DumpStackTrace(1, DebugWriteToStderr, NULL);
-  exit(1);
+  abort();
 }
 #endif