build: mkhash on FreeBSD

Apply patch from
https://bugs.openwrt.org/index.php?do=details&task_id=971
in order to make it easier to build OpenWRT on FreeBSD.

Signed-off-by: Piotr Stefaniak <pstef@freebsd.org>

scripts/mkhash.c

@@ -79,7 +79,12 @@
 
 
 
+#ifndef __FreeBSD__
 #include <endian.h>
+#else
+#include <sys/endian.h>
+#endif
+
 #include <stdio.h>
 #include <string.h>
 #include <stdint.h>
@@ -89,6 +94,7 @@
 
 #define ARRAY_SIZE(_n) (sizeof(_n) / sizeof((_n)[0]))
 
+#ifndef __FreeBSD__
 static void
 be32enc(void *buf, uint32_t u)
 {
@@ -99,6 +105,7 @@ be32enc(void *buf, uint32_t u)
 	p[2] = ((uint8_t) ((u >> 8) & 0xff));
 	p[3] = ((uint8_t) (u & 0xff));
 }
+#endif
 
 static void
 be64enc(void *buf, uint64_t u)