add missing file back to sln

azure-cli.pyproj

@@ -31,6 +31,7 @@
     <Compile Include="azure\cli\tests\test_argparse.py">
       <SubType>Code</SubType>
     </Compile>
+    <Compile Include="azure\cli\_locale.py" />
     <Compile Include="azure\cli\tests\test_profile.py" />
     <Compile Include="azure\cli\_argparse.py" />
     <Compile Include="azure\cli\_logging.py" />