package/kexec-lite: add an upstream URL to Config.in

Add an upstream URL to the help text in Config.in. This
addresses the 'Missing' URL status in the package stats
web page output.

Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 57234a49ef9dde153be0e39a1b6f63f4e8680b49)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kexec-lite/Config.in

@@ -15,6 +15,8 @@ config BR2_PACKAGE_KEXEC_LITE
 	  This package is a tiny implementation of the kexec userspace
 	  components, for devicetree-based platforms.
 
+	  https://github.com/antonblanchard/kexec-lite
+
 comment "kexec-lite needs a uClibc or glibc toolchain w/ wchar, dynamic library"
 	depends on BR2_powerpc || BR2_powerpc64
 	depends on BR2_STATIC_LIBS || !BR2_USE_WCHAR \