Automatically execute ubiviz.
Cleanup ubigraph files when don't drawing the graphs.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55459 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/ubiviz b/utils/ubiviz
index 1a8f742..687e8c0 100755
--- a/utils/ubiviz
+++ b/utils/ubiviz
@@ -50,6 +50,9 @@
     G.clear()
     for x in StreamData(arg):
       Display(G,x)
+  
+  sys.exit(0)
+  
 
 if __name__ == '__main__':
     main(sys.argv[1:])