MFH: r376609

Update webkit-gtk[23] to 1.4.8.

Switch webkit-gtk3 to compiler:c++11-lib instead of homegrown clang code [2].

This unbreaks the build on 8.x.

Axe WEBGL and WEBAUDIO options and turn them on by default (like upstream

intended). Disabling them leads to wierd build failures, due to untested
build paths. [1]

Only set -Qunused-arguments if the compiler is clang [2]
Fix SSL connection issues with some websites after the POODLE vulnerability fix.

PR: 196333 [1], 196031 [2], 195628 [2], 196296 [1]
Submitted by: peo@bsdlabs.com and david@catwhisker.org [1], truckman@ [2]
Security: e9ccdb28-9802-11e4-9d9c-bcaec565249c
Security: CVE-2014-1344, CVE-2014-1384, CVE-2014-1385, CVE-2014-1386
Security: CVE-2014-1387, CVE-2014-1388, CVE-2014-1389, CVE-2014-1390
Approved by: portmgr (zi@)