presets: forgotten libvpx presets

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ffpresets/libvpx-1080p.ffpreset

+vcodec=libvpx
+g=120
+rc_lookahead=16
+quality=good
+speed=0
+profile=1
+qmax=51
+qmin=11
+slices=4
+vb=2M
+
+#ignored unless using -pass 2
+maxrate=24M
+minrate=100k
+arnr_max_frames=7
+arnr_strength=5
+arnr_type=3

ffpresets/libvpx-1080p50_60.ffpreset

+vcodec=libvpx
+g=120
+rc_lookahead=25
+quality=good
+speed=0
+profile=1
+qmax=51
+qmin=11
+slices=4
+vb=2M
+
+#ignored unless using -pass 2
+maxrate=24M
+minrate=100k
+arnr_max_frames=7
+arnr_strength=5
+arnr_type=3

ffpresets/libvpx-360p.ffpreset

+vcodec=libvpx
+g=120
+rc_lookahead=16
+quality=good
+speed=0
+profile=0
+qmax=63
+qmin=0
+vb=768k
+
+#ignored unless using -pass 2
+maxrate=1.5M
+minrate=40k
+arnr_max_frames=7
+arnr_strength=5
+arnr_type=3

ffpresets/libvpx-720p.ffpreset

+vcodec=libvpx
+g=120
+rc_lookahead=16
+quality=good
+speed=0
+profile=0
+qmax=51
+qmin=11
+slices=4
+vb=2M
+
+#ignored unless using -pass 2
+maxrate=24M
+minrate=100k
+arnr_max_frames=7
+arnr_strength=5
+arnr_type=3

ffpresets/libvpx-720p50_60.ffpreset

+vcodec=libvpx
+g=120
+rc_lookahead=25
+quality=good
+speed=0
+profile=0
+qmax=51
+qmin=11
+slices=4
+vb=2M
+
+#ignored unless using -pass 2
+maxrate=24M
+minrate=100k
+arnr_max_frames=7
+arnr_strength=5
+arnr_type=3