Add PowerShell script to update expected test results

Il2CppTests/update-expected-results.ps1

@@ -0,0 +1,17 @@
+# Copyright 2019 Katy Coe - http://www.hearthcode.org - http://www.djkaty.com
+# All rights reserved.
+
+# This script copies all the test results from TestBinaries into TestExpectedResults with the correct filenames
+# The idea is to update all the expected results once we have confirmed an improvement to the codebase works correctly to save a lot of manual copying
+# It is only intended to be used during development, not for end-user scenarios
+
+# Get all test results
+$bin = (gci "$PSScriptRoot/TestBinaries/*/*" -Filter test-result.cs)
+
+# Get path to expected test results
+$results = "$PSScriptRoot/TestExpectedResults"
+
+$bin | % {
+	$target = $results + "/" + (Split-Path -Path (Split-Path -Path $_) -Leaf) + ".cs"
+	cp $_ -Destination $target -Force
+}