Easyconfigs for NCO and its dependency ANTLR

Two simple new easyconfigs and a supporting patch file.
Hmm, are you sure this is correct @pm67nz?

Here's what I'm getting on my end:

```
$ ls software/NCO/4.4.4-intel-2014b/bin
ncap2  ncatted  ncbo  ncdiff  ncea  ncecat  nces  ncflint  ncks  ncpdq  ncra  ncrcat  ncrename
```

So, only `ncap2`, no `ncap` binary...