flavours/linux: Fix runqemu arguments to run without X11

runqemu's nographic option sets qemu argument display to none and this allows to use runqemu script in headless environment (without X11) Using nographic qemuparam doesn't affect display setting and sdl is used which causes Could not initialize SDL(x11 not available) - exiting error

Closes: #794 (closed)

Signed-off-by: Pavel Zhukov pavel.zhukov@huawei.com

flavours/linux/conf-notes.txt

@@ -29,6 +29,6 @@ or via command line, e.g.:
 
 You can also run generated qemu images with a command:
 
-    $ runqemu qemux86-64 qemuparams="-nographic" oniro-image-base wic ovmf slirp
+    $ runqemu qemux86-64 oniro-image-base wic ovmf slirp nographic
 
 Then log in as 'oniro' user with 'oniro' as a password.