Gyp changes for NaCl debugger

trunk/gyp/images.gyp

 {
   'targets': [
     {
       'target_name': 'images',
       'product_name': 'skia_images',
       'type': 'static_library',
       'standalone_static_library': 1,
       'dependencies': [
         'libjpeg.gyp:*',
         'utils.gyp:utils',
@@ skipping 88 matching lines @@
           # libpng stuff:
           # Any targets that depend on this target should link in libpng and
           # our code that calls it.
           # See http://code.google.com/p/gyp/wiki/InputFormatReference#Dependent_Settings
           'link_settings': {
             'sources': [
               '../src/images/SkImageDecoder_libpng.cpp',
             ],
             'libraries': [
               '-lpng',
+              '-lz',
             ],
           },
           # end libpng stuff
         }],
         [ 'skia_os == "android"', {
           'include_dirs': [
              '../src/utils',
           ],
           'dependencies': [
              'android_deps.gyp:gif',
@@ skipping 22 matching lines @@
       },
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: