Open-mpi: 1.6.4 and devel 1.7rc7

* Stable update to 1.6.4
* Add devel version 1.7rc7, which passes tests when built by Clang. So
  only fail with clang when building stable versions.

Closes #18112.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
ROOT 5.34.05

This commit updates the formula to install the ROOT data analysis
framework developed by CERN.  ROOT is widely used in the particle
physics community, both inside and outside of CERN.

Closes #17988.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
cpanminus 1.6001

Closes #18110.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
vim 7.3.843

Closes #18109.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
highlight 3.12

Closes #18106.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>