On the fsfs-improvements branch:  Speed up svn_fs_fs__paths_changed.
On the fsfs-improvements branch:  Speed up svn_fs_fs__paths_changed.

Since we eliminated the copyfrom_cache in r1504887 and the svn_fs
level struct is a sub-element of the FSFS change_t as of r1505671,
we don't need to call fold_change via process_changes anymore.
Instead, just create the result hash and simplify process_changes.

* subversion/libsvn_fs_fs/transaction.c
  (process_changes): drop "prefolded" as it'd be always FALSE now
  (svn_fs_fs__txn_changes_fetch): update caller
  (svn_fs_fs__paths_changed): directly build the result hash

git-svn-id: 2c7ed5bc06a69ba39b874304b5a8005b1c01e2e4@1505676 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion