It is possible that recipe specific tasks, or build processes drop
files into the kernel source directory. These files can cause problems
with the meta data detection in the kern-tools.
With this change, we have a single unified meta data detection routine,
that logs the result in a new file ".metadir", which subsequent scripts
can find, and use, thereby avoid repeating the same check many times.
We also enhance the check to look for a sentinel file in a proper meta
directory, to avoid false positives when an unexpected kernel process
leaves an uncommitted directory in the kernel dir.
[YOCTO: #7441]
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
