[source] mtd: fix endianness detection on musl

[LEDE Commits]

stintel pushed a commit to source.git, branch master:
https://git.lede-project.org/dec29082e0d3d9aed4815e969641bd155b799b42

commit dec29082e0d3d9aed4815e969641bd155b799b42
Author: Stijn Tintel <stijn at linux-ipv6.be>
AuthorDate: Fri Oct 21 17:32:03 2016 +0300

    mtd: fix endianness detection on musl
    
    Signed-off-by: Stijn Tintel <stijn at linux-ipv6.be>
    Acked-by: John Crispin <john at phrozen.org>
---
 package/system/mtd/src/mtd.c   | 1 +
 package/system/mtd/src/seama.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/package/system/mtd/src/mtd.c b/package/system/mtd/src/mtd.c
index 822e466..91e169e 100644
--- a/package/system/mtd/src/mtd.c
+++ b/package/system/mtd/src/mtd.c
@@ -23,6 +23,7 @@
 
 #define _GNU_SOURCE
 #include <byteswap.h>
+#include <endian.h>
 #include <limits.h>
 #include <unistd.h>
 #include <stdlib.h>
diff --git a/package/system/mtd/src/seama.c b/package/system/mtd/src/seama.c
index bcda321..1f66adc 100644
--- a/package/system/mtd/src/seama.c
+++ b/package/system/mtd/src/seama.c
@@ -22,6 +22,7 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
+#include <endian.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>