Workaround broken udev update on openSUSE
Workaround broken udev update on openSUSE

Delete stale symlinks created by current openSUSE 13.1
for kpartx loopback partitions. Those break bootloader
installation otherwise.

Change-Id: I13a7387e341b4426b459610fd1d3c49ce5730f46

varunarya10/diskimage-builder,openstack/diskimage-builder,NaohiroTamura/diskimage-builder,rdo-management/diskimage-builder,citrix-openstack-build/diskimage-builder,eantyshev/diskimage-builder,NaohiroTamura/diskimage-builder,eantyshev/diskimage-builder,citrix-openstack-build/diskimage-builder,varunarya10/diskimage-builder,switch-ch/diskimage-builder,CSC-IT-Center-for-Science/diskimage-builder,JioCloud/diskimage-builder,switch-ch/diskimage-builder,JioCloud/diskimage-builder,takahashinobuyuki/diskimage-builder,takahashinobuyuki/diskimage-builder,zioproto/diskimage-builder,zioproto/diskimage-builder,openstack/diskimage-builder,rdo-management/diskimage-builder,CSC-IT-Center-for-Science/diskimage-builder