Skia: Add Command Buffer support to Linux/Mac

gyp/common_conditions.gypi

Index: gyp/common_conditions.gypi
diff --git a/gyp/common_conditions.gypi b/gyp/common_conditions.gypi
index 54fa54345ec1d18468a5eef84dd0c20963b02864..a06fcb77c1bff3ba02ce573bdf3949f56bd6ce9c 100644
--- a/gyp/common_conditions.gypi
+++ b/gyp/common_conditions.gypi
@@ -618,6 +618,12 @@
       ],
     }],
 
+    [ 'skia_command_buffer', {
+      'ldflags': [
+          '-Wl,-rpath,\$$ORIGIN/lib',
+      ],
+    }],
+
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {