* add a logging mechanism to show repeated messages at exponentially
  declining rates, so as to reduce the amount of junk spewed out by
  the various support functions for the MacOS syscall wrappers.

* add a couple more cases to the resync filter for Yosemite.  This
  is working pretty well now.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14725 a5019735-40e9-0310-863c-91ae7b9d1cf9
Add even more suppressions for Yosemite.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14726 a5019735-40e9-0310-863c-91ae7b9d1cf9