t/helper: merge test-sha1-array into test-tool

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/t/helper/test-sha1-array.c b/t/helper/test-sha1-array.c
index edfd52d..ad5e69f 100644
--- a/t/helper/test-sha1-array.c
+++ b/t/helper/test-sha1-array.c
@@ -1,3 +1,4 @@
+#include "test-tool.h"
 #include "cache.h"
 #include "sha1-array.h"
 
@@ -7,7 +8,7 @@ static int print_oid(const struct object_id *oid, void *data)
 	return 0;
 }
 
-int cmd_main(int argc, const char **argv)
+int cmd__sha1_array(int argc, const char **argv)
 {
 	struct oid_array array = OID_ARRAY_INIT;
 	struct strbuf line = STRBUF_INIT;