dialyzer related changes

[Kostis Sagonas]

The (hopefully final) set of changes to dialyzer for R14 can be obtained 
with the following command:

	git fetch git://github.com/kostis/otp.git dialyzer-R14-fixes

It fixes all problems that I am aware of.

It should be relatively straightforward to include and I do not expect 
any surprises (it has been thoroughly tested on our side). There are at 
least three set of changes that it needs so that it becomes complete, 
but these are already in 'pu':

  - bg/bif-types

  - bg/nif_error

  - the change described in:
http://github.com/bjorng/otp/commit/23f14da94daf1f51e202febf1673177dda0d385d

and they should also be included in 'dev'.

Kostis