enable shared lib support in linux for lua

gyp/skia_lib.gyp

 # The minimal set of static libraries for basic Skia functionality.
 
 {
   'variables': {
     'component_libs': [
       'core.gyp:core',
       'effects.gyp:effects',
       'images.gyp:images',
       'opts.gyp:opts',
       'ports.gyp:ports',
@@ skipping 31 matching lines @@
         [ 'skia_shared_lib', {
           'conditions': [
             [ 'skia_os == "android"', {
               # The name skia will confuse the linker on android into using the system's libskia.so
               # instead of the one packaged with the apk. We simply choose a different name to fix
               # this.
               'product_name': 'skia_android',
             }, {
               'product_name': 'skia',
             }],
+            [ 'skia_lua', {
+              'dependencies': [
+                'pdf.gyp:pdf',

[bungeman-skia, 2013/06/12 19:16:55]

We should at least have a comment here about how any dependencies other than
targets in lua.gyp here are because lua.gyp exposes them. This seems rather iffy
to me, as SkLua can, in theory, expose anything it wants, making skia_shared_lib
into skia_kitchen_sink_shared_lib. It has already shown that this complicates
any target in this list, as it should depend on skia_shared_lib, except when
it's in it, in which case it needs to depend on the things which are in the
non-lua skia_shared_lib.

+                'lua.gyp:lua',
+              ],
+            }],
           ],
           'type': 'shared_library',
         }, {
           'type': 'none',
         }],
       ],
       'dependencies': [
         '<@(component_libs)',
       ],
       'export_dependent_settings': [
         '<@(component_libs)',
       ],
     },
   ],
 }
 
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