qt5: update LICENSE in git recipes

* move common part to qt5-git.bb and add GPLv2 only
  in recipes which allow to use that
* for details about LGPLv3 read:
  http://blog.qt.digia.com/blog/2014/08/20/adding-lgpl-v3-to-qt/

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qtwebengine: simplify SRC_URI

* now when it was moved from qt-labs to qt prefix we can reuse the
  SRC_URI from qt5-git.bb

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
packagegroup-qt5-toolchain-target: always include qttools packages

The qttools packages were included only if the ruby layer was enabled
as it required qtwebkit. However, qttools now has a PACKAGECONFIG
option for qtwebkit and does not enable it by default so we can include
the qttools packages even if the ruby layer is not enabled.

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qtbase: fix path to external hostbindir binaries

This fixes syncqt.pl not being included in qtbase-tools.

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qtwebengine: backport patches to fix ARM build failures

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
nativesdk-qtbase: make it possible to keep additional libraries

In some usecases for the nativesdk, you might need some build tools that are built upon Qt5. This means
that we're having a need to keep more of the libraries build by nativsdk-qtbase. This patch adds the
infrastructure to support that

Signed-off-by: Anders Darander <anders@chargestorm.se>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>