MFH: r401217

multimedia/libvpx: bring more Chromium defaults

• Add SIZE_LIMIT to work around CVE-2015-4506
• Add MULTIRES and extend POSTPROC
• Sort options

PR: 203410
Approved by: maintainer timeout (6 weeks)
Approved by: ports-secteam (feld)
Security: 6ca7eddd-d436-486a-b169-b948436bcf14