qa: use recent kernel to kernel build testing

Fixes: http://tracker.ceph.com/issues/24679

Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>

qa/cephfs/begin.yaml

@@ -3,4 +3,8 @@ tasks:
       extra_packages:
         rpm: ['python3-cephfs']
         deb: ['python3-cephfs', 'cephfs-shell']
+      # For kernel_untar_build workunit
+      extra_system_packages:
+        deb: ['bison', 'flex', 'libelf-dev', 'libssl-dev']
+        rpm: ['bison', 'flex', 'elfutils-libelf-devel', 'openssl-devel']
   - ceph:

qa/workunits/kernel_untar_build.sh

@@ -2,11 +2,11 @@
 
 set -e
 
-wget -q http://download.ceph.com/qa/linux-4.0.5.tar.xz
+wget -O linux.tar.gz http://download.ceph.com/qa/linux-4.17.tar.gz
 
 mkdir t
 cd t
-tar Jxvf ../linux*.xz
+tar xzf ../linux.tar.gz
 cd linux*
 make defconfig
 make -j`grep -c processor /proc/cpuinfo`