Build - improve windows clean script

Author: samaaron

app/win-clean.bat

@@ -1,16 +1,19 @@
+@echo off
 set WORKING_DIR=%CD%
-
 cd %~dp0
 
+
+
 @echo Cleaning out vcpkg....
 rmdir vcpkg /s /q
 
 @echo Cleaning out build dir....
 rmdir build /s /q
 
+
 @echo Cleaning out any CMakeCache files....
 for /r "." %%F in (CMakeCache.txt) do (
-    del "%%F" /q
+    if exist "%%F" del "%%F" /q
 )
 
 @echo Cleaning out BEAM distribution....