Sort input file list (#3302)

Reviewed By: datumbox

Differential Revision: D26156387

fbshipit-source-id: 443b0a34d6186b3a372d900c3ac78b3473abef64

Author: vincentqb

setup.py

@@ -227,7 +227,7 @@ def get_extensions():
     ext_modules = [
         extension(
             'torchvision._C',
-            sources,
+            sorted(sources),
             include_dirs=include_dirs,
             define_macros=define_macros,
             extra_compile_args=extra_compile_args,