Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>

Thanks to Vincent Penquerc'h.

taglib: write some more id3v2 tags and add empty function for APE and Xiph comments (will be added later).

additionally, fixed the libmodplug patch

Aliases need to be rebuilt when the prefix is changed.
This should fix #2373.

Fixed framework compilation and changed the configure script to configure VLC with the SDK selected in Xcode (at present: the current OS X version)

The previous commit confused i_line_count and i_line:
* txt->i_line_count contains the number of text lines.
* txt->i_line is the current offset in txt->line.

As a result no subtitles were available because TextGetLine always returned NULL.
Signed-off-by: Rémi Denis-Courmont <rdenis@simphalempin.com>

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>