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

sbin/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.125 2013/10/28 19:05:21 mbalmer Exp $
+#	$NetBSD: Makefile,v 1.127 2014/09/11 13:10:03 roy Exp $
 #	@(#)Makefile	8.5 (Berkeley) 3/31/94
 
 # Not ported: XNSrouted enpload scsiformat startslip
@@ -45,7 +45,6 @@ SUBDIR+= mount_portal
 SUBDIR+= mount_procfs
 SUBDIR+= mount_ptyfs
 SUBDIR+= mount_puffs
-SUBDIR+= mount_smbfs
 SUBDIR+= mount_sysvbfs
 SUBDIR+= mount_tmpfs
 SUBDIR+= mount_umap
@@ -57,7 +56,7 @@ SUBDIR+= cgdconfig
 .endif
 
 .if (${USE_INET6} != "no")
-SUBDIR+= ping6 rtsol
+SUBDIR+= ping6
 .endif
 
 .if (${MKISCSI} != "no")