Automated commit: libchrome r1330034 uprev

- fix broken patch backward-compatibility-0100-Revert-Code-Health-remove-SupportsWeakPtr.patch
- add long-term-2400-select-non-libz-Crc32-implementation.patch to avoid
  needing to pull in large zlib third_party library for a single
  function
Merge with upstream commit c59671dcccbef044465a1f4744a213b17ead679f

BUG=None
TEST=sudo emerge libchrome

Change-Id: Ibe52e798bc5b7c658879d326b42c4125deab584a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/libchrome/+/5725792
Tested-by: Brett Brotherton <bbrotherton@google.com>
Reviewed-by: Grace Cham <hscham@chromium.org>
Commit-Queue: Grace Cham <hscham@chromium.org>