kbuild: Add homepage field to debian/control file

This helps when the user sees information of the packages on package
managers like aptitude.

Signed-off-by: Rogério Brito <rbrito@ime.usp.br>
Signed-off-by: Michal Marek <mmarek@suse.cz>

scripts/package/builddeb

@@ -152,6 +152,7 @@ Section: admin
 Priority: optional
 Maintainer: $maintainer
 Standards-Version: 3.8.1
+Homepage: http://www.kernel.org/
 EOF
 
 if [ "$ARCH" = "um" ]; then