git: 45916e7c91ce..66082b6c88b9 - vendor/expat - vendor branch updated

[Xin LI]

The branch vendor/expat has been updated by delphij:

URL: https://cgit.FreeBSD.org/src/log/?id=45916e7c91ce..66082b6c88b9

66082b6c88b9 Vendor import of expat 2.4.9.