The reasons for the switch are here:
http://lists.openembedded.org/pipermail/openembedded-core/2015-July/107091.html
http://lists.openembedded.org/pipermail/openembedded-core/2016-January/116007.html

Changes made to libav recipe:
- drop libav-fix-CVE-2014-9676.patch, the fix is available upstream
- merge .inc into .bb, only one upstream version (latest one) is provided
- drop separate libpostproc recipe, the library is provided directly
from ffmpeg source tree
- drop ARM tweaks; they date to classic-OE, need to be retested against the
new code and probably haven't been relevant for a long time
- drop PACKAGECONFIG options that are no longer provided upstream
- drop build and packaging tweaks that don't seem to do anything useful
and also date back to classic OE; if you run into issues, please report
- explicitly enable PIC and disable stripping of binaries

Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

The currnet patches in OE-core doesn't have the "CVE:"
tag, now part of the policy of the patches.

This is patch add this tag to several patches. There might
be patches that I miss; the tag can be added in the future.

Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

With the autodebug package generation logic, specifically setting FILES_${PN}-dbg
isn't needed in most cases, we can remove them.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

libav's build system seems to think that prefix="" means that it should
use its default of /usr/local. Setting a prefix of "/" appears to be
sufficient to make it do the right thing.

Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

./configure --help says:

  --disable-avserver       deprecated, does nothing

Signed-off-by: Mike Crowe <mac@mcrowe.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

When MACHINE=qemux86-64 and enable multilib:
ERROR: QA Issue: libpostproc: Files/directories were installed but not shipped in any package:
  /usr/lib
  /usr/lib/libpostproc.so.52.3.0
  /usr/lib/libpostproc.so
  /usr/lib/libpostproc.so.52
  /usr/lib/.debug
  /usr/lib/.debug/libpostproc.so.52.3.0
Please set FILES such that these items are packaged. Alternatively if they are unneeded, avoid installing them or delete them within do_install. [installed-vs-shipped]

Pass the right libdir to configure as otherwise it assumes $prefix/lib
which may be wrong.

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>