always use -Wno-deprecated-declarations when building sdch

sdch/sdch.gyp

Index: sdch/sdch.gyp
diff --git a/sdch/sdch.gyp b/sdch/sdch.gyp
index af65409c9a37a8fdd0e43521abf05fbd1567532a..e71a2360892e8b5bddbe5ad166497fb560d42724 100644
--- a/sdch/sdch.gyp
+++ b/sdch/sdch.gyp
@@ -52,14 +52,14 @@
           'open-vcdiff/src',
         ],
       },
+      # TODO(mostynb): remove this if open-vcdiff is ever updated for c++11.
+      'cflags': [ '-Wno-deprecated-declarations' ],

[jochen (gone - plz use gerrit), 2014/03/20 16:19:01]

does windows understand this? maybe we need os_posix==1 or clang=="1" or
something?

[Nico, 2014/03/20 16:23:05]

Windows doesn't use 'cflags'. But gcc 4.6 might get confused by this?

[Mostyn Bramley-Moore, 2014/03/20 16:24:17]

Oh, right.  I always forget windows.  Will do.

[Nico, 2014/03/20 16:25:05]

Nonono, windows doesn't use cflags.

[Mostyn Bramley-Moore, 2014/03/20 16:29:23]

OK, I'll move it back then.

       'conditions': [
         [ 'OS == "linux" or OS == "android"', { 'include_dirs': [ 'linux' ] } ],
         [ 'os_bsd==1 or OS=="solaris"', { 'include_dirs': [ 'bsd' ] } ],
         [ 'OS == "ios"', { 'include_dirs': [ 'ios' ] } ],
         [ 'OS == "mac"', { 'include_dirs': [ 'mac' ] } ],
         [ 'OS == "win"', { 'include_dirs': [ 'win' ] } ],
-        # TODO(mark): Remove usage of the deprecated auto_ptr.
-        [ 'clang == 1', { 'cflags': [ '-Wno-deprecated-declarations' ] } ],
       ],
       # open-vcdiff's logging.h introduces static initializers. This was
       # reported upstream years ago (