rpm: Pick debugfs package db files/dirs explicitly

Rather than copying the entire /etc hierarchy, specify the pieces we
actually need.

(From OE-Core rev: c8fbba7c0bb442282fe19abdcee492407e20b8cb)

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit f0fea55ab02b013484282177a636795a254e7986)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/lib/oe/package_manager/rpm/rootfs.py

@@ -110,7 +110,7 @@ class PkgRootfs(Rootfs):
         if self.progress_reporter:
             self.progress_reporter.next_stage()
 
-        self._setup_dbg_rootfs(['/etc', '/var/lib/rpm', '/var/cache/dnf', '/var/lib/dnf'])
+        self._setup_dbg_rootfs(['/etc/rpm', '/etc/rpmrc', '/etc/dnf', '/var/lib/rpm', '/var/cache/dnf', '/var/lib/dnf'])
 
         execute_pre_post_process(self.d, rpm_post_process_cmds)