package.bbclass: Correctly handle /usr/src/debug file ownership

After the recent cached path operation improvements, we need to tell
the cache about directory changes. /usr/src/debug was was cached as
not created and this was leading to bugs in file ownership. This
change updates the cache and avoids this issue.

(From OE-Core rev: 553a8010e81448629a94ab04fd989e6e49066f2b)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/package.bbclass

@@ -302,6 +302,7 @@ def copydebugsources(debugsrcdir, d):
             if not cpath.exists(basepath):
                 nosuchdir.append(basepath)
         bb.utils.mkdirhier(basepath)
+        cpath.updatecache(basepath)
 
         processdebugsrc =  "LC_ALL=C ; sort -z -u '%s' | egrep -v -z '(<internal>|<built-in>)$' | "
         # We need to ignore files that are not actually ours