Fixes #4124: Move r30306 to v1.7 branch (Bring down upstream hwloc 438d9ed7457888c63d29778bda56cd27c52a8d51)

---svn-pre-commit-ignore-below---

r30306 [[BR]]
Bring down upstream hwloc 438d9ed7457888c63d29778bda56cd27c52a8d51 to
work around buggy NUMA node cpusets (i.e., buggy BIOSs).

Thanks to Jeff Becker for reporting the issue.

Submitted by Brice Goglin, reviewed by Jeff Squyres.

cmr=v1.7.4:reviewer=ompi-rm1.7
Fixes #4126: Move r30308 to v1.7 branch (update readme with pgi testing release notes)

---svn-pre-commit-ignore-below---

r30308 [[BR]]
Add the results of Paul's Fortran testing as release notes in the README.

cmr=v1.7.4:reviewer=rhc:subject=Update README with PGI testing release notes

r30309 [[BR]]
+ fix typo in previous README addition