[OE-core] libav

[Yi Qingliang]

why there are two versions libav in oe-core? what's the difference?
why the opencv will use the 0.8.x version, but not 9.x version?
does it should use the higher version?

libav 0.8.x has warning:

WARNING: QA Issue: ELF binary
'/mnt/qt5-test/build/tmp/work/armv6-vfp-jilong-linux-gnueabi/libav/0.8.15-r0/packages-split/libswscale/usr/lib/libswscale.so.2.1.0'
has relocations in .text [textrel]
WARNING: QA Issue: ELF binary
'/mnt/qt5-test/build/tmp/work/armv6-vfp-jilong-linux-gnueabi/libav/0.8.15-r0/packages-split/libpostproc/usr/lib/libpostproc.so.52.0.0'
has relocations in .text [textrel]
WARNING: QA Issue: ELF binary
'/mnt/qt5-test/build/tmp/work/armv6-vfp-jilong-linux-gnueabi/libav/0.8.15-r0/packages-split/libavutil/usr/lib/libavutil.so.51.22.2'
has relocations in .text [textrel]
WARNING: QA Issue: ELF binary
'/mnt/qt5-test/build/tmp/work/armv6-vfp-jilong-linux-gnueabi/libav/0.8.15-r0/packages-split/libavformat/usr/lib/libavformat.so.53.21.1'
has relocations in .text [textrel]
WARNING: QA Issue: ELF binary
'/mnt/qt5-test/build/tmp/work/armv6-vfp-jilong-linux-gnueabi/libav/0.8.15-r0/packages-split/libavfilter/usr/lib/libavfilter.so.2.15.0'
has relocations in .text [textrel]
WARNING: QA Issue: ELF binary
'/mnt/qt5-test/build/tmp/work/armv6-vfp-jilong-linux-gnueabi/libav/0.8.15-r0/packages-split/libavdevice/usr/lib/libavdevice.so.53.2.0'
has relocations in .text [textrel]
WARNING: QA Issue: ELF binary
'/mnt/qt5-test/build/tmp/work/armv6-vfp-jilong-linux-gnueabi/libav/0.8.15-r0/packages-split/libavcodec/usr/lib/libavcodec.so.53.35.0'
has relocations in .text [textrel]
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