flac: fix CVE-2021-0561

flac: fix CVE-2021-0561

In append_to_verify_fifo_interleaved_ of stream_encoder.c, there is
a possible out of bounds write due to a missing bounds check. This
could lead to local information disclosure with no additional
execution privileges needed. User interaction is not needed for
exploitation.Product: AndroidVersions: Android-11Android ID: A-174302683

References:
https://nvd.nist.gov/vuln/detail/CVE-2021-0561

Upstream patches:
https://github.com/xiph/flac/commit/e1575e4a7c5157cbf4e4a16dbd39b74f7174c7be

Signed-off-by: Li Wang <li.wang@windriver.com>
Signed-off-by: Joe Slater <joe.slater@windriver.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>