include "microhttpd2.h" instead of <microhttpd2.h> in tests

src/tests/basic/test_basic_checks.c

@@ -26,7 +26,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <microhttpd2.h>
+#include "microhttpd2.h"
 
 /* Helper macros */
 

src/tests/client_server/libtest.h

@@ -29,7 +29,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <microhttpd2.h>
+#include "microhttpd2.h"
 
 /**
  * Information about the current phase.

src/tests/client_server/test_client_server.c

@@ -23,7 +23,7 @@
  * @brief  test with client against server
  * @author Christian Grothoff
  */
-#include <microhttpd2.h>
+#include "microhttpd2.h"
 #include "mhd_config.h"
 #include "libtest.h"
 

src/tests/client_server/test_postprocessor.c

@@ -23,7 +23,7 @@
  * @brief  test with client against server
  * @author Christian Grothoff
  */
-#include <microhttpd2.h>
+#include "microhttpd2.h"
 #include "mhd_config.h"
 #include "libtest.h"