update qthttpserver
update qthttpserver

Change-Id: I1a4864616d862ad0c255d4ddf13273cc41698fcb
Reviewed-on: http://cr.qtquick.me/493
Tested-by: http://ci.qtquick.me/
Tested-by: Tasuku Suzuki <42980d970444f9101663582e70cd53623b3238b4@gmail.com>
Reviewed-by: Tasuku Suzuki <42980d970444f9101663582e70cd53623b3238b4@gmail.com>

yatsek/silk,yatsek/silk,qt-users-jp/silk,yatsek/silk,qt-users-jp/silk,qt-users-jp/silk,yatsek/silk,qt-users-jp/silk