Case 585394.

Unity 4.5

# By Andreia Gaita (9) and others
# Via Andreia Gaita (2) and Levi Bard (1)
* 'unity-staging' of github.com:Unity-Technologies/mono:
  [sharpziplib] Fix DiskStorage so it doesn't keep private state when it's overridden
  Add required overload for adding entries to zip with metadata (otherwise file attributes will be incorrect)
  Fix bad cherry-pick of liveness change.
  added api to unity liveness for multithreading
  Fix several 64bit pointers being truncated to 32bit integers.
  Fix GC losing objects on OSX64 due to registers not getting pushed as roots.
  Nunit and Mono.Cairo are no longer in the 1.0 dirs
  Nunit build fixes for the 1.0-less world
  Fix copying of files, rsync is more reliable (and preserves attributes)
  Fix cecil installation
  Only build the bare essentials on the 1.1 profile, and make all tools based on 2.0 assemblies
  Remove dupe source file from sources list
  Don't try to use a potentially null assembly name, the assembly might not have been found.
  Kill really really old ziplib code
  Update SharpZipLib to latest upstream v0.86.0.518

Fix ARM IMT calls on AOT platform. ARM AOT implementation of imt_thunks supports only linear array/list of IMT items

Custom implementations of DiskStorage may need to control the stream, temporary filename
or how the stream is open (custom file permissions, etc). Keeping private state in
the base class makes it useless for implementors.

Add required overload for adding entries to zip with metadata (otherwise file attributes will be incorrect)

Update SharpZipLib to latest version and default to building most libraries with the 2.0 profile

svn path=/trunk/mono/; revision=143172

svn path=/trunk/mcs/; revision=143173

Unity 4.5 staging

By wrapping sigaction we make sure to always install a signal handler compiled for thumb.
The source code for the signal handler can be found here:
https://github.com/Unity-Technologies/krait-signal-handler

Fix iOS crosscompilation issues on Windows.

Fix ARM IMT calls on AOT platform. ARM AOT implementation of imt_thunks supports only linear array/list of IMT items

Unity 4.5 -> Unity Staging

Unity 4.5 - trunk changes

Add unity function to clear domain specific fields from thread object, as they may hold objects from an unloaded domain.