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/dist/clang/lib/StaticAnalyzer/Checkers/UndefinedArraySubscriptChecker.cpp

@@ -25,7 +25,7 @@ using namespace ento;
 namespace {
 class UndefinedArraySubscriptChecker
   : public Checker< check::PreStmt<ArraySubscriptExpr> > {
-  mutable OwningPtr<BugType> BT;
+  mutable std::unique_ptr<BugType> BT;
 
 public:
   void checkPreStmt(const ArraySubscriptExpr *A, CheckerContext &C) const;
@@ -50,7 +50,7 @@ UndefinedArraySubscriptChecker::checkPreStmt(const ArraySubscriptExpr *A,
   if (!N)
     return;
   if (!BT)
-    BT.reset(new BuiltinBug("Array subscript is undefined"));
+    BT.reset(new BuiltinBug(this, "Array subscript is undefined"));
 
   // Generate a report for this bug.
   BugReport *R = new BugReport(*BT, BT->getName(), N);