Fix the nightly tester to default to using gnuplot in /usr/bin

llvm-svn: 15287
diff --git a/llvm/utils/NightlyTest.pl b/llvm/utils/NightlyTest.pl
index 6e59e81..49d4c4b 100755
--- a/llvm/utils/NightlyTest.pl
+++ b/llvm/utils/NightlyTest.pl
@@ -751,7 +751,7 @@
 #
 # Rebuild the graphs now...
 #
-$GNUPLOT = "/usr/dcs/software/supported/bin/gnuplot";
+$GNUPLOT = "/usr/bin/gnuplot";
 $GNUPLOT = "gnuplot" if ! -x $GNUPLOT;
 system ("$GNUPLOT", $PlotScriptFilename);