Update Oflops repository in install.sh

util/install.sh

@@ -555,7 +555,7 @@ function cbench {
         $install libsnmp-dev libpcap-dev libconfig-dev
     fi
     cd $BUILD_DIR/
-    git clone git://openflow.org/oflops.git
+    git clone git://gitosis.stanford.edu/oflops.git
     cd oflops
     sh boot.sh || true # possible error in autoreconf, so run twice
     sh boot.sh