qt5: bump to version 5.4.0

qt5base:
  - Add patches to fix uClibc build.

qt5connectivity:
  - Add patches to fix build with -no-c++11

qt5declarative:
  - Remove the line that installs accessible plugin. The functionality
    is moved into the qtquick library.

qt5webkit:
  - Remove egl patch. This should be fixed with CONFIG += egl option.

qt5websockets:
  - Remove upstreamed patch.

Changelogs: https://qt-project.org/wiki/Change-files-in-Qt-5.4.0


Signed-off-by: Fatih Aşıcı <fatih.asici@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>