vp80-03-segmentation-0?.ivf: correct fourcc

s/I420/VP80/

Change-Id: Ief888d2b933c48df14212a65f48c5a2f7ac54722
diff --git a/vp80-03-segmentation-01.ivf b/vp80-03-segmentation-01.ivf
index 4163ca9..c3baf84 100644
--- a/vp80-03-segmentation-01.ivf
+++ b/vp80-03-segmentation-01.ivf
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diff --git a/vp80-03-segmentation-02.ivf b/vp80-03-segmentation-02.ivf
index b2f079b..8347254 100644
--- a/vp80-03-segmentation-02.ivf
+++ b/vp80-03-segmentation-02.ivf
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diff --git a/vp80-03-segmentation-03.ivf b/vp80-03-segmentation-03.ivf
index 447e0b6..74cd793 100644
--- a/vp80-03-segmentation-03.ivf
+++ b/vp80-03-segmentation-03.ivf
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diff --git a/vp80-03-segmentation-04.ivf b/vp80-03-segmentation-04.ivf
index 0208550..cab3f5b 100644
--- a/vp80-03-segmentation-04.ivf
+++ b/vp80-03-segmentation-04.ivf
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