OWNERS: adjust matchers

There are a few 'matchers' statements specified in OWNERS files that
do not do anything.  git doesn't track directories, so we cannot do
an 'exact' match on a directory.  Switch these 'matchers' to be a
'partial_regex' so that any file included in these paths will match.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I47329241bc9e6eba6f4ecd1b92b7ebe5d7230939
diff --git a/meta-ibm/OWNERS b/meta-ibm/OWNERS
index 440bb8a..7c5da8a 100644
--- a/meta-ibm/OWNERS
+++ b/meta-ibm/OWNERS
@@ -3,6 +3,6 @@
 - anoo@us.ibm.com
 
 matchers:
-- exact: recipes-kernel
+- partial_regex: recipes-kernel
   reviewers:
   - joel@jms.id.au