UBUNTU: [Debian] consider renames in gen-auto-reconstruct

UBUNTU: [Debian] consider renames in gen-auto-reconstruct

Recent git versions have changed the rename detection to default when
using git-diff. Previous behavior would allow the reconstruct script to
remove the renamed files, which are added in the diff, but not removed.

Using --no-renames option will revert to the previous behavior when
using those recent git versions.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>