[NaCl SDK] .dsc files copy public headers, add ppapi_cpp dev sources

native_client_sdk/src/build_tools/parse_dsc.py

 #!/usr/bin/env python
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import collections
 import fnmatch
 import optparse
 import os
 import sys
 
+VALID_TOOLCHAINS = ['newlib', 'glibc', 'pnacl', 'win', 'linux', 'mac']
+
 # 'KEY' : ( <TYPE>, [Accepted Values], <Required?>)
 DSC_FORMAT = {
     'DISABLE': (bool, [True, False], False),
     'DISABLE_PACKAGE': (bool, [True, False], False),
-    'TOOLS' : (list, ['newlib:arm', 'newlib:x64', 'newlib:x86', 'newlib',
-                      'glibc', 'pnacl', 'win', 'linux'], True),
+    'TOOLS' : (list, VALID_TOOLCHAINS, True),
     'CONFIGS' : (list, ['Debug', 'Release'], False),
     'PREREQ' : (list, '', False),
     'TARGETS' : (list, {
         'NAME': (str, '', True),
         # main = nexe target
         # lib = library target
         # so = shared object target, automatically added to NMF
         # so-standalone =  shared object target, not put into NMF
         'TYPE': (str, ['main', 'lib', 'static-lib', 'so', 'so-standalone'],
                  True),
@@ skipping 195 matching lines @@
   except ValidationError as e:
     sys.stderr.write(str(e) + '\n')
     return 1
 
   PrintProjectTree(tree)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))