quiltimport: Skip non-existent patches
quiltimport: Skip non-existent patches

When quiltimport encounters a non-existent patch in the series file,
just skip to the next patch. This matches the behavior of quilt.

Signed-off-by: Dan Nicholson <2570c412b7cbb4203ff39baaca2bd49e72848226@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git