wireless_tools: Fix site URL does not work

Replace broken http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux
by https://hewlettpackard.github.io/wireless-tools

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[Peter: also adjust URL in Config.in]
Signed-off-by: Vadim Kochan <vadim.kochan@petcube.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>