Make PrologEpilogInserter save/restore all callee saved registers
in functions which call __builtin_unwind_init()

__builtin_unwind_init() is an undocumented gcc intrinsic which has this effect,
and is used in libgcc_eh.

Goes part of the way toward fixing PR8541.

Merged from r183984
Author: Derek Schuff <dschuff@google.com>
Date:   Fri Jun 14 16:15:29 2013 +0000
Attempt to fix the mingw32 bot.

This should hopefully fix
http://lab.llvm.org:8011/builders/clang-x86_64-darwin11-self-mingw32

Merged from r182446
Author: Rafael Espindola <rafael.espindola@gmail.com>
Date:   Wed May 22 02:30:47 2013 +0000
Bump version to 3.3.1
Add -dot flag to test-release.sh

This is meant to be used when testing dot releases e.g.:

./test-release -release 3.3 -dot 1 -rc 1