roll libwebm snapshot

git log --no-merges --oneline 9732ae9..a97c484
9096786 mkvparser: fix float conversion warning
84e8257 disable -Wdeprecated-declarations in legacy code
a98f495 AddGenericFrame: fix memory leak on failure
da131dd AddCuePoint: fix memory leak on failure
b0cea9c Add(Audio|Video)Track: fix memory leak on failure
5261a67 webm_info: check vp9 ParseUncompressedHeader return
85f7e2e webm_info,PrintVP9Info: validate alt ref sizes
9b97ca1 vp9_header_parser_tests: check parser return
300d6d8 CuePoint::Find: check Track pointer
50c44bb webm_info,OutputCues: fix indexing of tracks
a0d27f0 mkvparser,Block::Parse: remove incorrect assert
784fc1b vttdemux,CloseFiles: check file pointer before closing
b4522c1 .gitattributes: force mkv/webm to be treated as binary
a118f3d Add test for projection parse failures.
d398479 Add test for primary chromaticity parse failures.
9bbec4c Fix permissions on test file.
2cef4d5 mkvparser:Parse: s/FLT_MIN/-FLT_MAX/
35a3c88 mkvmuxer: Turn off estimate_file_duration_ by default
5a41830 mkvparser: Avoid double free when Chromaticity parse fails.
67e3ffa mkvparser: Avoid casts of values too large for float in
Projection elements.
87bcddf vttdemux::ChapterAtomParser: check for NULL display string
a534a24 Update .gitignore
a0d67d0 mkvmuxer: Fix hard-coded data size in EbmlElementSize
c36112c mkvparser: #include sys/type.h
686664e Fix cmake generation warnings on Windows.
2b2c196 cmake: Fix required flag check.
166e40f Cmake refactor.
9fb774a Add missing include in webm2pes.cc.
4956b2d mkvmuxer: Force new clusters when audio queue gets too long.
54f1559 cmake: Cache results of CXX flag tests.
81c73fc mkvparser: Avoid alloc failures in SeekHead::Parse.

Change-Id: Ib81b1772ec81e7af3852dcfef2d312416f6db53d
7 files changed