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/libLLVMX86CodeGen/Makefile

@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile,v 1.10 2013/04/28 00:41:01 joerg Exp $
+#	$NetBSD: Makefile,v 1.13 2015/01/29 20:41:36 joerg Exp $
 
 LIB=	LLVMX86CodeGen
 
@@ -7,8 +7,6 @@ LIB=	LLVMX86CodeGen
 .PATH: ${LLVM_SRCDIR}/lib/Target/X86
 
 SRCS+=	X86AsmPrinter.cpp \
-	X86COFFMachineModuleInfo.cpp \
-	X86CodeEmitter.cpp \
 	X86FastISel.cpp \
 	X86FixupLEAs.cpp \
 	X86FloatingPoint.cpp \
@@ -16,7 +14,6 @@ SRCS+=	X86AsmPrinter.cpp \
 	X86ISelDAGToDAG.cpp \
 	X86ISelLowering.cpp \
 	X86InstrInfo.cpp \
-	X86JITInfo.cpp \
 	X86MachineFunctionInfo.cpp \
 	X86MCInstLower.cpp \
 	X86PadShortFunction.cpp \