Regression from d70cda88.

The layout of struct addrinfo is variable (notably because of RFC5014),
so copying hints is brittle.

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>

For consistency with 691e604c, libass doesn't need harfbuzz on Android. (It doesn't build anyway.)
Signed-off-by: Rafaël Carré <funman@videolan.org>

Pointed-out-by: Michał Trzebiatowski <hippie_1968@hotmail.com>

Qt ensures event IDs are never reused by providing a way to register
them dynamically. We have code that allocate event IDs statically and we
need to check/register those then to ensure proper offset for dynamic
ones. (we could just register them too, but this wouldn't allow
switch/case through values)

Close #7348
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Plus one friendship was unused.

libavutil.h doesnt include common.h since lavu 51.39.

Unbreaks build on OSX.