llvm-3.8 does not contain pp-trace

[Eyalroz]

The LLVM package is supposed to contain the pp-trace tool; and some users report it's present on their system. However, downloading llvm-3.8 (or llvm-3.7), for Xenial Xerus, amd64 architecture, yields a .deb without that file. It should be in /usr/lib/llvm-3.8/bin/pp-trace, and isn't there.

I'm also seeing a broken symlink to it from /usr/bin/pp-trace.

Notes:

* See the discussion on AskUbuntu: http://askubuntu.com/questions/856186/no-clang-package-for-16-04-seems-to-contain-pp-trace?
* A possibly related Debian bug: http://bugs.debian.org/839909
* This machine was dist-upgraded from 15.10 wily to 16.04 xenial; that should probably not matter though.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: llvm-3.8 1:3.8-2ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: LXDE
Date: Sat Dec 3 19:19:39 2016
InstallationDate: Installed on 2016-07-29 (127 days ago)
InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: llvm-toolchain-3.8
UpgradeStatus: No upgrade log present (probably fresh install)