archive: use manifest.matches() to simplify and speed up matching

manifest.matches() can avoid walking paths the user did not want to
archive.

Differential Revision: https://phab.mercurial-scm.org/D5178

mercurial/archival.py

@@ -321,7 +321,7 b' def archive(repo, dest, node, kind, deco'
         if match(name):
             write(name, 0o644, False, lambda: buildmetadata(ctx))
 
-    files = [f for f in ctx.manifest().keys() if match(f)]
+    files = [f for f in ctx.manifest().matches(match)]
     total = len(files)
     if total:
         files.sort()