gst1-plugins-base: bump version to 1.12.0

Remove non-existant or unnecessary configure options:

  --disable-oggtest, --disable-vorbistest:
    It looks like these options will be taken into account by ogg.m4 and
    vorbis.m4 only when ogg and vobis are enabled. However, according to
    the code on those m4 files these two options are disabled by default.

  --disable-gio_unix_2_0:
    I don't know where this option comes from.

  --disable-freetypetest:
    https://github.com/GStreamer/gst-plugins-base/commit/183610c035dd6955c9b3540b940aec50474af031



[Peter: add rawparse plugin]
Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>