NetBSD re-synchronization of the source tree

This brings our tree to NetBSD 7.0, as found on -current on the
10-10-2015.

This updates:
 - LLVM to 3.6.1
 - GCC to GCC 5.1
 - Replace minix/commands/zdump with usr.bin/zdump
 - external/bsd/libelf has moved to /external/bsd/elftoolchain/
 - Import ctwm
 - Drop sprintf from libminc

Change-Id: I149836ac18e9326be9353958bab9b266efb056f0

tests/include/sys/t_socket.c

@@ -1,4 +1,4 @@
-/*	$NetBSD: t_socket.c,v 1.3 2013/10/19 17:45:00 christos Exp $	*/
+/*	$NetBSD: t_socket.c,v 1.4 2015/02/27 08:30:30 martin Exp $	*/
 
 #include <sys/types.h>
 #include <sys/mount.h>
@@ -74,7 +74,7 @@ ATF_TC(cmsg_sendfd);
 ATF_TC_HEAD(cmsg_sendfd, tc)
 {
 	atf_tc_set_md_var(tc, "descr", "Checks that fd passing works");
-	atf_tc_set_md_var(tc, "timeout", "2");
+	atf_tc_set_md_var(tc, "timeout", "10");
 }
 
 ATF_TC_BODY(cmsg_sendfd, tc)