gator-daemon: Fix compilation error: 'sa_family_t' does not name a type

When compiling on Linaro Android we get the following error:

bionic/libc/kernel/common/linux/netlink.h:52:2: error: 'sa_family_t' does not name a type
  sa_family_t nl_family;

This is related to an issue that was fixed in Linux 3.1 by commit
6602a4baf4 (net: Make userland include of netlink.h more sane)
but it seems that the Linux headers used by bionic predate that.

Fortunately, the fix for us is simple: reorder the header file includes
so that the definition of sa_family_t from sys/socket.h is picked up
before being used by linux/netlink.h

Signed-off-by: Jon Medhurst <tixy@linaro.org>

tools/gator/daemon/UEvent.cpp

@@ -8,9 +8,10 @@
 
 #include "UEvent.h"
 
+#include <sys/socket.h>
 #include <linux/netlink.h>
 #include <string.h>
-#include <sys/socket.h>
+
 #include <unistd.h>
 
 #include "Logging.h"