[arch-dev-public] HEADS UP: Qt 5.11 in [testing]

[Antonio Rojas]

As usual, due to Qt's ABI versioning, everything compiled against Qt 5.11 will get a runtime dependency on it, so it will have to stay in testing until Qt itself moves. Keep it in mind if you plan to build Qt stuff against testing or staging.

Other changes of interest for packagers:
- qdoc now relies on the clang code parser to generate docs. Since qt5-tools contains many other unrelated stuff I've only made it an optdepend. If your package uses qdoc to generate docs you'll need to explicitely add clang as a makedepend.
- there's been a huge header cleanup in Qt modules. Expect build failures for applications that rely on transitive includes instead of declaring all required headers. Those need to be fixed upstream by explicitely adding the missing includes.