Update buildroot 17.02.3 -> 17.02.4

bsp/buildroot/package/expat/0001-configure.ac-Fix-mis-detection-of-getrandom-on-Debia.patch

@@ -0,0 +1,29 @@
+From 602e6c78ca750c082b72f8cdf4a38839b312959f Mon Sep 17 00:00:00 2001
+From: Sebastian Pipping <sebastian@pipping.org>
+Date: Sun, 18 Jun 2017 18:55:10 +0200
+Subject: [PATCH] configure.ac: Fix mis-detection of getrandom on Debian
+ GNU/kFreeBSD (#50)
+
+There is no such thing but we need to link (not just compile) to realize.
+
+Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
+---
+ expat/configure.ac | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 1357c9a..444c002 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -130,7 +130,7 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([
+ 
+ 
+ AC_MSG_CHECKING([for getrandom (Linux 3.17+, glibc 2.25+)])
+-AC_COMPILE_IFELSE([AC_LANG_SOURCE([
++AC_LINK_IFELSE([AC_LANG_SOURCE([
+   #include <stdlib.h>  /* for NULL */
+   #include <sys/random.h>
+   int main() {
+-- 
+2.11.0
+