git: d1b143ee9a5c..45916e7c91ce - vendor/expat - vendor branch updated

[Xin LI]

The branch vendor/expat has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/log/?id=d1b143ee9a5c..45916e7c91ce

45916e7c91ce Vendor import of expat 2.4.7.