kexec: fix homepage URL

The old one gives 404 error.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/kexec/Config.in

@@ -7,7 +7,7 @@ config BR2_PACKAGE_KEXEC
 	  Kexec is a user space utiltity for loading another kernel
 	  and asking the currently running kernel to do something with it.
 
-	  http://www.kernel.org/pub/linux/kernel/people/horms/kexec-tools/
+	  https://www.kernel.org/pub/linux/utils/kernel/kexec/
 
 config BR2_PACKAGE_KEXEC_ZLIB
 	bool "zlib support"