Update WGET_URL to use archive.org.
Update WGET_URL to use archive.org.

This may be a transient error, but the provided wget.exe URL was
throwing HTTP/404 errors, and this was the simplest alternative that
seemed backwards compatible.

c-owens/windows,c-owens/windows,c-owens/windows,MSumulong/windows,StefanScherer/windows,quarkslab/windows,boxcutter/windows,TaylorMonacelli/boxcutter-windows,TaylorMonacelli/boxcutter-windows,boxcutter/windows,HirotakaKato/boxcutter-windows-ja,ambakshi/windows,samepage-labs/windows-templates,HirotakaKato/boxcutter-windows-ja,TaylorMonacelli/boxcutter-windows,MSumulong/windows,MSumulong/windows,seancoyne/windows,boxcutter/windows,StefanScherer/windows,quarkslab/windows,quarkslab/windows,seancoyne/windows,samepage-labs/windows-templates,StefanScherer/windows,seancoyne/windows,ambakshi/windows,MYOB-Technology/packer-sqlserver,TaylorMonacelli/boxcutter-windows,HirotakaKato/boxcutter-windows-ja,samepage-labs/windows-templates,ambakshi/windows