docs/qemux86: Use wic images

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

docs/hardware-support/virtual-boards/qemux86-64.rst

@@ -46,4 +46,4 @@ Once the image is done, you can run the Qemu using the provided script wrapper:
 
 .. code-block:: console
 
-   $ MACHINE=qemux86-64 runqemu
+   $ MACHINE=qemux86-64 runqemu allscenarios-image-base wic

docs/hardware-support/virtual-boards/qemux86.rst

@@ -46,4 +46,4 @@ Once the image is done, you can run the Qemu using the provided script wrapper:
 
 .. code-block:: console
 
-   $ MACHINE=qemux86 runqemu
+   $ MACHINE=qemux86 runqemu allscenarios-image-base wic