t/t5313-pack-bounds-checks.sh: prepare for sub-directories

Prepare for sub-directories to appear in $GIT_DIR/objects/pack by
adjusting the copy, remove, and chmod invocations to perform their
behavior recursively.

This prepares us for the new $GIT_DIR/objects/pack/multi-pack-index.d
directory which will be added in a following commit.

Signed-off-by: Taylor Blau <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ttaylorr

t/t5313-pack-bounds-checks.sh

@@ -7,11 +7,11 @@ TEST_PASSES_SANITIZE_LEAK=true
 
 clear_base () {
 	test_when_finished 'restore_base' &&
-	rm -f $base
+	rm -r -f $base
 }
 
 restore_base () {
-	cp base-backup/* .git/objects/pack/
+	cp -r base-backup/* .git/objects/pack/
 }
 
 do_pack () {
@@ -64,9 +64,9 @@ test_expect_success 'set up base packfile and variables' '
 	git commit -m base &&
 	git repack -ad &&
 	base=$(echo .git/objects/pack/*) &&
-	chmod +w $base &&
+	chmod -R +w $base &&
 	mkdir base-backup &&
-	cp $base base-backup/ &&
+	cp -r $base base-backup/ &&
 	object=$(git rev-parse HEAD:file)
 '