clang: Add llvm-pdbutil and llvm-undname to package.

These programs will be used to extract resource whitelists from PDBs.

Not creating a new package because llvm-undname at our pinned revision
cannot demangle resource whitelist function names without crashing.

Bug: 684788
Change-Id: I75bb11abcaca456adbea53799359a3259b942b17
Reviewed-on: https://chromium-review.googlesource.com/1180646Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Peter Collingbourne <pcc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584558}

tools/clang/scripts/package.py

@@ -230,7 +230,9 @@ def main():
   # Copy a whitelist of files to the directory we're going to tar up.
   # This supports the same patterns that the fnmatch module understands.
   exe_ext = '.exe' if sys.platform == 'win32' else ''
-  want = ['bin/llvm-symbolizer' + exe_ext,
+  want = ['bin/llvm-pdbutil' + exe_ext,
+          'bin/llvm-symbolizer' + exe_ext,
+          'bin/llvm-undname' + exe_ext,
           'bin/sancov' + exe_ext,
           # Copy built-in headers (lib/clang/3.x.y/include).
           'lib/clang/*/include/*',
@@ -300,7 +302,12 @@ def main():
             os.path.splitext(f)[1] in ['.so', '.a']):
         subprocess.call([EU_STRIP, '-g', dest])
 
-  stripped_binaries = ['clang', 'llvm-symbolizer', 'sancov']
+  stripped_binaries = ['clang',
+                       'llvm-pdbutil',
+                       'llvm-symbolizer',
+                       'llvm-undname',
+                       'sancov',
+                       ]
   if sys.platform.startswith('linux'):
     stripped_binaries.append('lld')
     stripped_binaries.append('llvm-ar')