Move debug symbols into the debug archive

Currently the extra setting Auto-Built-Package: debug-symbols is needed
to actually move it in addition to the debug section.

debian/changelog

@@ -16,6 +16,9 @@ linux (4.7~rc6-1~exp1) UNRELEASED; urgency=medium
     image kernel
   * [x86] KASLR, power: Remove x86 hibernation restrictions
 
+  [ Bastian Blank ]
+  * Mark debug symbols packages to move them into the debug archive.
+
  -- Ben Hutchings <ben@decadent.org.uk>  Tue, 21 Jun 2016 20:43:50 +0100
 
 linux (4.7~rc4-1~exp1) experimental; urgency=medium

debian/templates/control.image-dbg.in

@@ -3,6 +3,7 @@ Build-Profiles: <!stage1>
 Depends: ${misc:Depends}
 Section: debug
 Priority: extra
+Auto-Built-Package: debug-symbols
 Description: Debugging symbols for Linux @abiname@@localversion@
  This package provides the detached debugging symbols for the Linux kernel
  and modules in linux-image-@abiname@@localversion@.