Win32: update daily_build.bat rules

Stop building svn based tags. Those were for 2.4 and older
Prepare to do weekly 2.6 builds once we that branch is created

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@23775 57a11ea4-9604-0410-9ed3-97b8803252fd