Add BEGIN_EXTERN_C() and END_EXTERN_C() to .h files missing them.
Update NEWS after rebase.
Update the VM generation script, per Bob.
Merge branch 'pull-request/840' into PHP-5.5

* pull-request/840:
  Update the VM generation script, per Bob.
  Update NEWS after rebase.
  Add BEGIN_EXTERN_C() and END_EXTERN_C() to .h files missing them.
update NEWS
fix NEWS order