Initial drop of uapi aarch64 and common headers.

Retrieved from linux-3.11.4

Change-Id: I5a0c11490ab672f775d14642b26f5f4ba43c5143

Conflicts:
	original/uapi/linux/kexec.h
diff --git a/original/uapi/linux/un.h b/original/uapi/linux/un.h
new file mode 100644
index 0000000..3ed3e46
--- /dev/null
+++ b/original/uapi/linux/un.h
@@ -0,0 +1,13 @@
+#ifndef _LINUX_UN_H
+#define _LINUX_UN_H
+
+#include <linux/socket.h>
+
+#define UNIX_PATH_MAX	108
+
+struct sockaddr_un {
+	__kernel_sa_family_t sun_family; /* AF_UNIX */
+	char sun_path[UNIX_PATH_MAX];	/* pathname */
+};
+
+#endif /* _LINUX_UN_H */