runqemu: also accept -image suffix for rootfs parameter
The magic detection of the rootfs parameter only worked for image
recipes which embedd the "image" string in the middle, as in
"core-image-minimal".
Sometimes it is more natural to call an image "something-image". To
get such an image detected by runqemu, "-image" at the end of a
parameter must also cause that parameter to be treated as the rootfs
parameter.
Inside the image directory, "something-image" has an -<arch> suffix
and thus no change is needed for those usages of
re.search('-image-'). However, while at it also enhance those string
searches a bit (no need for re; any()+map() a bit closer to the
intended logic).
Signed-off-by: Patrick Ohly <patrick.ohly@intel.com>
