Summary of changes:
f623e91... Bump release. (*)
e03a401... 5.12.3 (*)
9f3afea... rebase fix-extractcflag.patch (*)
f695cee... pull in some upstream fixes (*)
898c002... pull in qtwebengine-SIOCGSTAMP.patch from fedora (*)
(*) This commit already existed in another branch; no separate mail sent