sparse-checkout: fix cone mode behavior mismatch

sparse-checkout: fix cone mode behavior mismatch

The intention of the special "cone mode" in the sparse-checkout
feature is to always match the same patterns that are matched by the
same sparse-checkout file as when cone mode is disabled.

When a file path is given to "git sparse-checkout set" in cone mode,
then the cone mode improperly matches the file as a recursive path.
When setting the skip-worktree bits, files were not expecting the
MATCHED_RECURSIVE response, and hence these were left out of the
matched cone.

Fix this bug by checking for MATCHED_RECURSIVE in addition to MATCHED
and add a test that prevents regression.

Reported-by: Finn Bryant <finnbryant@gmail.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>