Remove extra space at end of line in output.

The done dumping histograms message in DumpHistogram had an extra
space before the \n, which this CL removes.

Change-Id: I9db3c185cb39fec6cbe78a60699357448bc6e3b0
diff --git a/runtime/base/timing_logger.cc b/runtime/base/timing_logger.cc
index f1f6f9b..1942e1d 100644
--- a/runtime/base/timing_logger.cc
+++ b/runtime/base/timing_logger.cc
@@ -125,7 +125,7 @@
     histogram->CreateHistogram(&cumulative_data);
     histogram->PrintConfidenceIntervals(os, 0.99, cumulative_data);
   }
-  os << "Done Dumping histograms \n";
+  os << "Done Dumping histograms\n";
 }
 
 TimingLogger::TimingLogger(const char* name, bool precise, bool verbose)