Chris Packham dd4d19fce2 zlib: Update to zlib-1.2.12 ...

Bring in the following changes

- Fix a deflate bug when using the Z_FIXED strategy that can result in
  out-of-bound accesses.
- Fix a deflate bug when the window is full in deflate_stored().
- Speed up CRC-32 computations by a factor of 1.5 to 3.
- Use the hardware CRC-32 instruction on ARMv8 processors.
- Speed up crc32_combine() with powers of x tables.
- Add crc32_combine_gen() and crc32_combine_op() for fast combines.

Drop two patches that have been applied upstream and regenerate the
remaining two.

Fixes #1708

Signed-off-by: Chris Packham <judge.packham@gmail.com>

2022-04-22 10:15:41 +12:00

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