mraa: fix build for musl

* be16toh and le16toh are defined in endian.h

Signed-off-by: Tim Orling <timothy.t.orling@linux.intel.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-extended/mraa/mraa/0001-examples-iio_driver.c-include-endian.h-to-fix-musl-b.patch

@@ -0,0 +1,29 @@
+From 6c2649718fc9818da0d602a0b4767ea21a367e9e Mon Sep 17 00:00:00 2001
+From: Tim Orling <timothy.t.orling@linux.intel.com>
+Date: Sat, 27 Jan 2018 02:06:36 -0800
+Subject: [PATCH] examples/iio_driver.c: include endian.h to fix musl build
+
+* be16toh and le16toh are defined in endian.h
+
+Upstream-Status: Pending
+
+Signed-off-by: Tim Orling <timothy.t.orling@linux.intel.com>
+---
+ examples/iio_driver.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/examples/iio_driver.c b/examples/iio_driver.c
+index c5a0181..e3dc438 100644
+--- a/examples/iio_driver.c
++++ b/examples/iio_driver.c
+@@ -23,6 +23,7 @@
+  */
+ 
+ #include <unistd.h>
++#include <endian.h>
+ #include "mraa/iio.h"
+ 
+ static void
+-- 
+2.13.6
+

meta-oe/recipes-extended/mraa/mraa_git.bb

@@ -10,6 +10,8 @@ PV = "1.7.0-git${SRCPV}"
 
 SRC_URI = "git://github.com/intel-iot-devkit/${BPN}.git;protocol=http"
 
+SRC_URI_append_libc-musl = " file://0001-examples-iio_driver.c-include-endian.h-to-fix-musl-b.patch"
+
 S = "${WORKDIR}/git"
 
 # CMakeLists.txt checks the architecture, only x86 and ARM supported for now