On linux don't compile and link against lzo, soil, and sfml "Externals."

Instead use system libraries liblzo2-dev, libsoil-dev, and libsfml-dev


git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5105 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Core/Src/SConscript

@@ -137,9 +137,11 @@ else:
 libs = [
 	'bdisasm',
         'inputcommon',
-	'lua',
-        'sfml'
+	'lua'
 	]
 
+if sys.platform == 'darwin':
+    libs = ['sfml-network'] + libs
+
 env_core = env.Clone();
 env_core.StaticLibrary(env['local_libs'] + 'core', files, LIBS=libs)