Update Qt5 to 5.14.2
Very big thanks go again to kai@ who provided the www/qt5-webengine upgrade (to
5.14.0).
Notably, video capture support was re-enabled.
Announcement:
https://www.qt.io/blog/qt-5.14-has-released
PR: 244964
Exp-run by: antoine
www/qt5-webengine: Update to 5.12.1
It was again a long journey to bring the port in sync with the other Qt5
ports. It runs now under the hood with Chromium 69.0.3497.128 and applied
security fixes up to version 71.0.3578.94.
Also the approach with the handling of the BUILD.gn files has changed. With
the previous version of www/qt5-webengine (and www/chromium up to r449991) the
boolean variables "is_bsd" and "is_posix" were set to true in BUILDCONFIG
when FreeBSD was detected as operating system during the build process.
Now the boolean variable "is_linux" is set to true as well and this reduces
some patching of BUILD.gn files. It makes it (hopefully) also somewhat easier
to exclude Linux-only features from future www/qt5-webengine versions.
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