tree2scop.c: scop_add_inc: take into account affine break conditions

tree2scop.c: scop_add_inc: take into account affine break conditions

Ever since 1bcd2f8 (pet_scop_from_pet_tree: extract pet_scop from the
root down to the leaves, Wed Jan 1 14:32:37 2014 +0100) the affine
continue conditions are applied to the pet_context beforehand
rather than applying them afterwards in pet_scop_restrict.
However, this commit failed to adjust the handling of skip
conditions on loop increments accordingly, resulting in the affine
break conditions getting dropped from the loop increment statements.
Add them back.

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>