Script to confirm build is clean.

generate/verify_clean.bat

@@ -0,0 +1,16 @@
+@echo off
+setlocal EnableDelayedExpansion
+
+set clean=true
+for /f %%x in ('git status --porcelain') do (
+    set clean=false
+)
+
+if !clean! == false (
+    echo.verify_clean: There are local file changes - build is not clean:
+    git status
+    exit /b 1
+)
+
+echo.verify_clean: OK
+exit /b 0