package-index: index also subdirectories when using rpm
Previously only the top-level index was created, which did not
work if PACKAGE_FEED_ARCHS whitelisting (or explicitly listing
architectures in dnf repo files by hand) was in use:
https://lists.yoctoproject.org/pipermail/yocto/2018-March/040327.html
https://bugzilla.yoctoproject.org/show_bug.cgi?id=12419
[YOCTO #12419]
Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
