Update mp4 vp9 test files to follow v1.0 spec

media/test/data/README

Index: media/test/data/README
diff --git a/media/test/data/README b/media/test/data/README
index b28de98898725d08fd250c443a96f420514af804..0d444e811c636dfa2c9e26fe12da506c1efe8ace 100644
--- a/media/test/data/README
+++ b/media/test/data/README
@@ -64,9 +64,9 @@ bear-1280x720-v_frag-cenc.mp4 - A fragmented MP4 version of the video track of b
 bear-1280x720-v_frag-cenc-key_rotation.mp4 - A fragmented MP4 version of the video track of bear-1280x720.mp4 encrypted (ISO CENC) using key ID [1] and key [2] with key rotation [3].
 bear-1280x720-v_frag-cenc_clear-all.mp4 - Same as bear-1280x720-v_frag-cenc.mp4 but no fragments are encrypted.
 bear-1280x720-a_frag-cenc_missing-saiz-saio.mp4 - An invalid file similar to bear-1280x720-a_frag-cenc.mp4 but has no saiz and saio boxes. To save space, it has only one encrypted sample.
-bear-320x240-v_frag-vp9.mp4 - Bear video with VP9 codec in MP4 container. Generated with shaka-packager (https://github.com/google/shaka-packager):
+bear-320x240-v_frag-vp9.mp4 - Bear video with VP9 codec in MP4 container. Generated with shaka-packager 1e2da22c8809c17cc4dfdb45924ec45e42058393 (https://github.com/google/shaka-packager):
                               packager in=bear-vp9.webm,stream=video,out=bear-320x240-v_frag-vp9.mp4
-bear-320x240-v_frag-vp9-cenc.mp4 - Same as above, with video encrypted using key ID [1] and key [2]. Generated with shaka-packager (https://github.com/google/shaka-packager):
+bear-320x240-v_frag-vp9-cenc.mp4 - Same as above, with video encrypted using key ID [1] and key [2]. Generated with shaka-packager 1e2da22c8809c17cc4dfdb45924ec45e42058393 (https://github.com/google/shaka-packager):
                                    packager in=bear-vp9.webm,stream=video,out=bear-320x240-v_frag-vp9-cenc.mp4 --enable_fixed_key_encryption --key_id 30313233343536373839303132333435
                                             --key ebdd62f16814d27b68ef122afce4ae3c --clear_lead 0
                                             --pssh 0000003470737368010000001077EFECC0B24D02ACE33C1E52E2FB4B000000013031323334353637383930313233343500000000000000467073736800000000EDEF8BA979D64ACEA3C827DCD51D21ED000000261210303132333435363738393031323334351A00221030313233343536373839303132333435