builddeb: Pass the kernel:debarch substvar to dpkg-genchanges

At the end of "make bindeb-pkg" I noticed the following warning:

dpkg-genchanges: warning: unknown substitution variable ${kernel:debarch}

It turns out that since dpkg version 1.19.0 dpkg-genchanges honors
substitution variables in the Description field, while earlier
versions silently left them alone, see https://bugs.debian.org/856547.

The result is an incomplete description of the linux-headers package
in the generated .changes file.  Fix it by passing the kernel:debarch
substitution variable to dpkg-genchanges.

Signed-off-by: Sven Joachim <svenjoac@gmx.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 0bc87473f68f..b4f0f2b3f8d2 100755
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -408,9 +408,9 @@ EOF
         dpkg-source -cdebian/control -ldebian/changelog --format="3.0 (custom)" --target-format="3.0 (quilt)" \
                 -b / ../${sourcename}_${version}.orig.tar.gz  ../${sourcename}_${packageversion}.debian.tar.gz
         mv ${sourcename}_${packageversion}*dsc ..
-        dpkg-genchanges > ../${sourcename}_${packageversion}_${debarch}.changes
+        dpkg-genchanges -Vkernel:debarch="${debarch}" > ../${sourcename}_${packageversion}_${debarch}.changes
 else
-        dpkg-genchanges -b > ../${sourcename}_${packageversion}_${debarch}.changes
+        dpkg-genchanges -b -Vkernel:debarch="${debarch}" > ../${sourcename}_${packageversion}_${debarch}.changes
 fi
 
 exit 0