Fix mime type bug

There should be an '&' after "ctype=text/javascript" and before
"dontcountme=s",
otherwise urls like "ctype=text/javascriptdontcountme=s" fail due to an
unrecognised mime type

Change-Id: I3450afbc89c49b530d3025ac1d24664c2fe52b11
Merge "Fix mime type bug"