The previous implementation was checking IMAGE_PKGTYPE and created the
index files just for the backend used to create the image. Apparently,
'bitbake package-index' should attempt to create the index files for all
backends specified in PACKAGE_CLASSES.
[YOCTO #5827]
(From OE-Core rev: 0521d48a1612bfc735e2c86acc9b685c1dc389ef)
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>