Easyblocks for R extenison patching (including extract) and Extesnion Rm...

...pi Intel MPI support (if version >= 0.6-4)
Yeah, exactly. Suggestion:

```python
if self.patches:
    loc = self.ext_dir
else:
    loc = self.ext_src
cmd = "R CMD INSTALL %s %s %s %s --no-clean-on-error" % (loc, confargs, confvars, prefix)
```