qt5: bump to 5.1.1

Following patches are removed since they are upstreamed:
  - qt5base/qt5base-0001-eglconvenience-add-egl-to-CONFIG-to-get-correct-incl.patch
  - qt5jsbackend/qt5jsbackend-0002-fix-uclibc.patch

Remove "-nomake demos" from configure options since "demos" directory is
merged into examples.

Signed-off-by: Fatih Aşıcı <fatih.asici@gmail.com>
Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>