Don't treat warnings as failures in the junit output

This matches Travis and the actual return code.
fix sapi/phpdbg/config.w32
dll export APIs needed by phpdbg
unix sockets aren't available on windows
use portable strndup implementation
export output globals

needed by phpdbg
fix output globals importing
Merge branch 'PHP-5.6'

* PHP-5.6:
  fix output globals importing
  export output globals
  use portable strndup implementation
  unix sockets aren't available on windows
  dll export APIs needed by phpdbg
  fix sapi/phpdbg/config.w32
  Don't treat warnings as failures in the junit output