debian/control: Correct build-dependency on xz-utils, needed on all arches

Currently we have xz-utils in build-depends-indep as we explicitly
use xz to compress files in linux-source.  We also have a build-
dependency on lzma (now a virtual package provided by xz-utils),
but only on armel which was the first architecture for which we
set CONFIG_KERNEL_XZ=y.

However, since 3.7 we've set CONFIG_KERNEL_XZ for all architectures so
xz-utils is needed everywhere.  Currently we get away with this
because dpkg-dev depends on xz-utils, but this could change in future.
Build-depend on xz-utils without qualification.

debian/changelog

@@ -8,6 +8,9 @@ linux (4.2~rc7-1~exp1) UNRELEASED; urgency=medium
   * [mips,mips64] Remove r4k-ip22, r5k-ip32 and sb1-bcm91250a flavours.
   * [mipsel,mips64el] Remove sb1-bcm91250a flavour.
 
+  [ Ben Hutchings ]
+  * debian/control: Correct build-dependency on xz-utils, needed on all arches
+
  -- Ben Hutchings <ben@decadent.org.uk>  Mon, 17 Aug 2015 10:28:46 +0200
 
 linux (4.2~rc6-1~exp1) experimental; urgency=medium

debian/templates/control.source.in

@@ -3,8 +3,8 @@ Priority: optional
 Maintainer: Debian Kernel Team <debian-kernel@lists.debian.org>
 Uploaders: Bastian Blank <waldi@debian.org>, maximilian attems <maks@debian.org>, Ben Hutchings <ben@decadent.org.uk>
 Standards-Version: 3.9.5
-Build-Depends: debhelper, cpio, kmod, python, python-six, lzma [armel], kernel-wedge, quilt, patchutils, bc
-Build-Depends-Indep: xz-utils, xmlto
+Build-Depends: debhelper, cpio, kmod, python, python-six, xz-utils, kernel-wedge, quilt, patchutils, bc
+Build-Depends-Indep: xmlto
 Vcs-Git: https://anonscm.debian.org/git/kernel/linux.git
 Vcs-Browser: https://anonscm.debian.org/cgit/kernel/linux.git
 Homepage: https://www.kernel.org/