Roll libxml to 0b3c64d9f2f3e9ce1a98d8f19ee7a763c87e27d5

This patch rolls libxml from e4fb36841800038c289997432ca547c9bfef9db1 to
0b3c64d9f2f3e9ce1a98d8f19ee7a763c87e27d5

add-missing-ifdef-in-xml-reader.patch was merged upstream.

add-fuzz-target.patch was added in order to prevent autoreconf failure
on mac.

config.h was generated in a different spot than the script looks for on
my windows machine, so I changed the path for it.

Bug: 934413
Change-Id: I8ddbdd9b36210942730b6b3b78051cff0c17d125
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2444429
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816473}
GitOrigin-RevId: be448ceae9ff5126b82c3e438a0f77ef891ba133
41 files changed