Ignore BrokenPipeError

Author: mitchellgoffpc

tools/lib/framereader.py

@@ -348,6 +348,8 @@ def write_thread(self):
           if len(r) == 0:
             break
           self.proc.stdin.write(r)
+    except BrokenPipeError:
+      pass
     finally:
       self.proc.stdin.close()