Support globs in maps

We need to remap sub folders.  This is very annoying to do with one map
per folder.  Recognize * and match it accordingly.

Change-Id: Ieae86dcec000206eadb913c29a8ee141e9e93f0f
diff --git a/aos/configuration.fbs b/aos/configuration.fbs
index c66da06..31d89e7 100644
--- a/aos/configuration.fbs
+++ b/aos/configuration.fbs
@@ -83,7 +83,9 @@
 // Table to support renaming channel names.
 table Map {
   // Channel to match with.  If the name in here matches, the name is replaced
-  // with the name in rename.
+  // with the name in rename.  If the name ends in *, it will be treated like a
+  // wildcard.  Anything with the same prefix will match, and anything matching
+  // the * will get preserved on rename.  This supports moving subfolders.
   // Node specific matches are also supported.
   match:Channel;
   // The channel to merge in.