[oe] [meta-qt5] fix do_rootfs for images with dev-pkgs in IMAGE_FEATURES

[Andreas Müller]

| Collected errors:
|  * satisfy_dependencies_for: Cannot satisfy the following dependencies for qtquickcontrols-dev:
|  *     qtquickcontrols (= 5.1.0-r0) *
|  * opkg_install_cmd: Cannot install package qtquickcontrols-dev.

Signed-off-by: Andreas Müller <schnitzeltony at googlemail.com>
---
 recipes-qt/qt5/qtquickcontrols.inc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/recipes-qt/qt5/qtquickcontrols.inc b/recipes-qt/qt5/qtquickcontrols.inc
index 63e884e..06b5350 100644
--- a/recipes-qt/qt5/qtquickcontrols.inc
+++ b/recipes-qt/qt5/qtquickcontrols.inc
@@ -1,3 +1,5 @@
 require qt5.inc
 
 DEPENDS += "qtdeclarative"
+
+ALLOW_EMPTY_${PN} = "1"
-- 
1.8.3.1