servo: Merge #20245 - Disable logging in bindgen to reduce code size (from mbrubeck:logging); r=emilio

This disables bindgen's `logging` feature, which builds `env_logger`
with default features, including regex support.  Disabling it allows
Gecko to build `env_logger` without the `regex` crate, reducing code
size.

Part of https://bugzilla.mozilla.org/show_bug.cgi?id=1444097

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes do not require tests because they only change unused build config

Source-Repo: https://github.com/servo/servo
Source-Revision: 46dfc3536472c1b68be501dc5b37ff6fdd7dba35

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : 202a5a3a0f0b83dab018f0f641d88e6c9ade9f22