cairo: sync with cairo-devel port

[brunvonlope]

Description

cairo-devel is building fine so it is time to sync:

Type(s)

• bugfix
• enhancement
• security fix

Tested on

macOS 26.3.1 25D2128 arm64
Xcode 26.4 17E192

Verification

Have you

• followed our Commit Message Guidelines?
• squashed and minimized your commits?
• checked that there aren't other open pull requests for the same change?
• referenced existing tickets on Trac with full URL in commit message?
• checked your Portfile with port lint?
• tried existing tests with sudo port test?
• tried a full install with sudo port -vst install?
• tested basic functionality of all binary files?
• checked that the Portfile's most important variants haven't been broken?

[macportsbot]

Notifying maintainers:
@mascguy for port cairo.
@ryandesign for port cairo.

[reneeotten]

@brunvonlope please be very accurate and careful when doing this kind of changes; there are -at least- a few mistakes from a quick look

[reneeotten]

since this is not an openmaintainer port we'll have to wait at least the usual 72-hours to give the maintainers a chance to respond to the PR.