omcproxy: fix compilation on little-endian CPUs

Don't use cpu_to_be32 outside of a function.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>

package/network/services/omcproxy/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=omcproxy
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE_URL:=https://github.com/sbyx/omcproxy.git
 PKG_SOURCE_PROTO:=git

package/network/services/omcproxy/patches/100-mrib.c-don-t-use-cpu_to_be32-outside-of-function.patch

@@ -0,0 +1,35 @@
+From 721064f2eb1dabe5bda63dcaff249b73ab891e6c Mon Sep 17 00:00:00 2001
+From: Eneas U de Queiroz <cote2004-github@yahoo.com>
+Date: Fri, 14 Dec 2018 15:13:41 -0200
+Subject: [PATCH] mrib.c: don't use cpu_to_be32 outside of function
+
+cpu_to_be32 is not a constant, so it can't be used outside of a
+function.
+
+Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>
+
+--- a/src/mrib.c
++++ b/src/mrib.c
+@@ -21,6 +21,7 @@
+ #include <stdio.h>
+ #include <string.h>
+ #include <stdlib.h>
++#include <endian.h>
+ #include <sys/socket.h>
+ #include <sys/ioctl.h>
+ #include <unistd.h>
+@@ -54,7 +55,13 @@ struct mrib_iface {
+ 	struct uloop_timeout timer;
+ };
+ 
+-static uint32_t ipv4_rtr_alert = cpu_to_be32(0x94040000);
++/* we can't use cpu_to_be32 outside a function */
++#if __BYTE_ORDER == __BIG_ENDIAN
++static uint32_t ipv4_rtr_alert = 0x94040000;
++#else
++static uint32_t ipv4_rtr_alert = 0x00000494;
++#endif
++
+ static struct {
+ 	struct ip6_hbh hdr;
+ 	struct ip6_opt_router rt;