snowshoe: add recipe for qt5/webkit2 based browser

Signed-off-by: Simon Busch <morphis@gravedo.de>
packagegroup-webos-ports-extended: add snowshoe browser application

Signed-off-by: Simon Busch <morphis@gravedo.de>
qtbase: using webos QPA as default for applications

Signed-off-by: Simon Busch <morphis@gravedo.de>
qt5-webos-plugin: add recipe

Signed-off-by: Simon Busch <morphis@gravedo.de>