install_helpers: install infoedit from GitHub

This commit also moves repository URL to be the last argument in every git clone command.

refs #3387

Change-Id: I7e90a928ca11a4f67c949fbc10fe1b4f54307dfc
diff --git a/install_helpers/install_ndncxx.py b/install_helpers/install_ndncxx.py
index 94850be..54fac0d 100644
--- a/install_helpers/install_ndncxx.py
+++ b/install_helpers/install_ndncxx.py
@@ -5,7 +5,7 @@
 def run():
     print "\nINSTALLING ndn-cxx"
     print "**********************"
-    os.system("git clone https://github.com/named-data/ndn-cxx --depth 1")
+    os.system("git clone --depth 1 https://github.com/named-data/ndn-cxx")
     os.chdir("ndn-cxx")
     os.system("./waf distclean")
     os.system("./waf configure")