Currently nativesdk-qt4-tools can't be built if the DISTRO_FEATURES doesn't contain x11.
To make it build we add a dependency to x11 only if the feature is activated.
(From OE-Core rev: 7216116c9552e812d8c75c0687223f9a84204a28)
Signed-off-by: Pascal Bach <pascal.bach@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>