Adds the liblxqtmount include dirs to the build system.

Signed-off-by: Luís Pereira <luis.artur.pereira@gmail.com>
Adapt to the new liblxqtmount portable headers

Signed-off-by: Luís Pereira <luis.artur.pereira@gmail.com>
Merge branch 'pre-qt5'

* pre-qt5:
  Adapt to the new liblxqtmount portable headers
  Adds the liblxqtmount include dirs to the build system.