libaom v3.7.2 release candidate 1

[Wan-Teh Chang]

Hi everyone,

libaom v3.7.2 release candidate 1 is available. The release tag is
v3.7.2-rc1. Your testing will be greatly appreciated.

This release includes three bug fixes. This release is ABI compatible
with the last release. See
https://aomedia.googlesource.com/aom/+log/v3.7.1..v3.7.2-rc1 for all the
commits in this release.

- Bug Fixes
* aomedia:3526: alloc_compressor_data() is called during every
aom_codec_control() call on the encoder. Note that this partially
reverts the fix for bug aomedia:3349.
* b/310457427 and b/310766628: Only use rec_sse in CBR mode.
* Fix a hang of cmake on arm64 macOS with cmake 3.27.0 or later.

Thanks,
Wan-Teh Chang