[ci skip] Update artifacts paths for msbuild

appveyor.yml

@@ -22,9 +22,9 @@ build_script:
     
     if($LastExitCode -ne 0) { $host.SetShouldExit($LastExitCode )  }
 artifacts:
-- path: build\src\helper.exe
+- path: vsbuild\src\RelWithDebInfo\helper.exe
   name: helper_exe
-- path: build\src\helper.pdb
+- path: vsbuild\src\RelWithDebInfo\helper.pdb
   name: helper_pdb
 on_success:
   - ps: Set-Location -Path $env:APPVEYOR_BUILD_FOLDER