test/core: tweak tests to work with tis-interpreter

 $ tis-inertpreter.sh --cc "-I. -I../.." text.c ../../text.c

or more conveniently

 $ make tis

1 files changed, 1 insertions, 1 deletions

diff --git a/core/map.c b/core/map.c
index 5fdc2eb..bcc9fb1 100644
--- a/core/map.c
+++ b/core/map.c
@@ -1,9 +1,9 @@
-#include <ccan/tap/tap.h>
 #include <stddef.h>
 #include <stdbool.h>
 #include <string.h>
 #include <stdio.h>
 #include <errno.h>
+#include "tap.h"
 #include "map.h"
 
 static bool get(Map *map, const char *key, const void *data) {