merge: use repo.wvfs.setflags() instead of util.setflags()
Most merge.py code goes through the vfs instead of maniulating
files directly, so let's do the same here.
--- a/mercurial/merge.py Fri May 12 11:20:25 2017 -0700
+++ b/mercurial/merge.py Thu May 11 18:38:43 2017 -0700
@@ -1288,7 +1288,7 @@
progress(_updating, z, item=f, total=numupdates, unit=_files)
flags, = args
audit(f)
- util.setflags(repo.wjoin(f), 'l' in flags, 'x' in flags)
+ repo.wvfs.setflags(f, 'l' in flags, 'x' in flags)
updated += 1
# the ordering is important here -- ms.mergedriver will raise if the merge