libgexiv2: change build style to gnu-configure
libgexiv2: change build style to gnu-configure

With meson running gtkdoc-mkhtml emits warnings which meson
treats as error and makes the cross builds fail.

Signed-off-by: Jürgen Buchmüller <2642204b262fe30d9fcde46ee57f8ed7ac19ed92@t-online.de>

necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages