tcping: fix upstream location

The upstream site is no longer available from http://www.linuxco.de,
but only from http://linuxco.de.

Fixes:

  http://autobuild.buildroot.net/results/03caf8403c31e2424c338de4df636dd900408b14/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/tcping/Config.in

@@ -11,4 +11,4 @@ config BR2_PACKAGE_TCPING
 	  desired port is reachable and then start connection
 	  establishment.
 
-	  http://www.linuxco.de/tcping/tcping.html
+	  http://linuxco.de/tcping/tcping.html

package/tcping/tcping.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 TCPING_VERSION = 1.3.5
-TCPING_SITE = http://www.linuxco.de/tcping
+TCPING_SITE = http://linuxco.de/tcping
 TCPING_LICENSE = GPLv3+
 TCPING_LICENSE_FILES = LICENSE