In the Windows clean script for buildbots, also clear the build dir
(so that stale test files, which can be very large, get wiped out)
diff --git a/Tools/buildbot/clean.bat b/Tools/buildbot/clean.bat
index ec71804..5c8f33e 100644
--- a/Tools/buildbot/clean.bat
+++ b/Tools/buildbot/clean.bat
@@ -2,6 +2,9 @@
call "%VS90COMNTOOLS%vsvars32.bat"
@echo Deleting .pyc/.pyo files ...
del /s Lib\*.pyc Lib\*.pyo
+@echo Deleting test leftovers ...
+rmdir /s /q build
cd PCbuild
vcbuild /clean pcbuild.sln "Release|Win32"
vcbuild /clean pcbuild.sln "Debug|Win32"
+cd ..