[fix] additional includes, config.h needed

Some string.h definitions only appear if _GNU_SOURCE is defined, which
is done for us in config.h. As usual, only include this in the .c files,
and first in the header.

include/aml.h

@@ -28,6 +28,8 @@
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <strings.h>
 #include <sys/mman.h>
 #include <unistd.h>
 

src/utils/bitmap.c

@@ -7,9 +7,8 @@
  *
  * SPDX-License-Identifier: BSD-3-Clause
 *******************************************************************************/
-
+#include "config.h"
 #include "aml.h"
-#include <string.h>
 
 #define AML_BITMAP_EMPTY       (0UL)
 #define AML_BITMAP_FULL        (~0UL)