Roll fontconfig to 2.11.0 and reenable poppler on mac

gyp/common_variables.gypi

 # Copyright 2012 The Android Open Source Project
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   # Get ready for the ugly...
   #
   # - We have to nest our variables dictionaries multiple levels deep, so that
   #   this and other gyp files can rely on previously-set variable values in
@@ skipping 39 matching lines @@
       # Re-define all variables defined within the level-3 'variables' dict,
       # so that siblings of the level-2 'variables' dict can see them.
       'skia_os%': '<(skia_os)',
 
       'conditions': [
         [ 'skia_os == "win"', {
           'os_posix%': 0,
         }, {
           'os_posix%': 1,
         }],
-        [ 'skia_os in ["linux", "win"]', {
+        [ 'skia_os in ["linux", "win", "mac"]', {
           'skia_poppler_enabled%': 1,
         }, {
           'skia_poppler_enabled%': 0,
         }],
         [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "mac"]', {
           'skia_arch_width%': 64,
         }, {
           'skia_arch_width%': 32,
         }],
         [ 'skia_os == "android"', {
@@ skipping 96 matching lines @@
     'ios_sdk_version%': '6.0',
     'skia_win_debuggers_path%': '<(skia_win_debuggers_path)',
     'skia_run_pdfviewer_in_gm%': 0,
 
     # These are referenced by our .gypi files that list files (e.g. core.gypi)
     #
     'skia_src_path%': '../src',
     'skia_include_path%': '../include',
   },
 }