net/linphone: update to 5.3.2

• work around build failure on FreeBSD <15 (requires the XSI timezone symbol, not the old BSD one, cf. D44281)
• work around build failure when git is installed
• fix dependencies

Changelog: https://gitlab.linphone.org/BC/public/linphone-desktop/-/blob/5.3.2/CHANGELOG.md?ref_type=tags

PR: 291969, 291317