Merge Predef library to release.

[SVN r85618]
Merged changes from trunk.

[SVN r85818]
Merged latest changes from trunk.

[SVN r85988]
Merged revision(s) 85994 from trunk: Add BOOST_USE_INTRIN_H support; remove #pragma intrinsic, not needed and not supported on Intel. Refs #6646. Refs #7318. Refs #9174.


[SVN r86416]