clatd: use correct header file.

Change-Id: I8e7130c1c9b7d6397bc5e705e58667fb7b37b598
diff --git a/clatd.c b/clatd.c
index 17a3548..06dcdb3 100644
--- a/clatd.c
+++ b/clatd.c
@@ -38,7 +38,7 @@
 #include <netinet/icmp6.h>
 #include <linux/icmp.h>
 
-#include <linux/capability.h>
+#include <sys/capability.h>
 #include <linux/prctl.h>
 #include <linux/if.h>
 #include <linux/if_tun.h>