fix CFLAGS_PHPDBGS and some formatting
fix ZEND_DEBUG usage
removed /EHa as __try/__catch syntax is used anyway

see http://msdn.microsoft.com/en-us/library/1deeycx5.aspx
Merge remote-tracking branch 'phpdbg/master' into PHP-5.6

* phpdbg/master:
  removed /EHa as __try/__catch syntax is used anyway
  fix ZEND_DEBUG usage
  fix CFLAGS_PHPDBGS and some formatting