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

external/bsd/llvm/lib/libLLVMPowerPCDisassembler/Makefile

@@ -0,0 +1,18 @@
+#	$NetBSD: Makefile,v 1.1 2014/01/05 16:38:07 joerg Exp $
+
+LIB=	LLVMPowerPCDisassembler
+
+.include <bsd.init.mk>
+
+PPC_OBJDIR!=	cd ${.CURDIR}/../libLLVMPowerPCCodeGen && ${PRINTOBJDIR}
+CPPFLAGS+=	-I${PPC_OBJDIR} -I${LLVM_SRCDIR}/lib/Target/PowerPC
+
+.PATH: ${LLVM_SRCDIR}/lib/Target/PowerPC/Disassembler
+
+SRCS+=	PPCDisassembler.cpp
+
+.if defined(HOSTLIB)
+.include <bsd.hostlib.mk>
+.else
+.include <bsd.lib.mk>
+.endif