qt5webkit: port of the egl-mediaplayer from 4.8

Limited to WebKit1 for now.
buildroot: adding support for dawn-sdk
dawn-sdk: fix target install path for rootfs
qt5base: add base support for uclibc dawn
qt5base: add support for directfb egl
qt5base: adding directfb hook support
qt5webkit: disable native-video-fullscreen support

This is not needed as rendering is done in a supposedly fast code path
already.
Merge pull request #23 from philn/egl-player

qt5webkit: adding egl-mediaplayer for rpi
qt5base: fix compile for rpi
qt5webkit: disconnect from player signal handlers

When the player is destructed properly disconnect from fakesink's
signals.
Merge pull request #24 from philn/egl-player

qt5webkit: disconnect from player signal handlers
qt5base: revert flags for uclibc
rpi-firmware: bump version
rpi: update kernel
qt5base: fix for uclibc builds
Enable dawn qt build, use eglfs and don't build qmldevtools
Merge pull request #25 from magomez/dawn

dawn: qt build and use eglfs and don't build qmldevtools
makefile updated
Merge pull request #26 from magomez/dawn

qt5base: makefile updated
Add broadcom eglfs implementation