Hexagon: updated software/libraries

Hexagon has updated software/libraries.

For full information on new features, changes and important information, please look at http://docs.cray.com/books/S-9401-1210//S-9401-1210.pdf

And for Chapel: http://docs.cray.com/books/S-9404-16/

Updates:

xt-asyncpe 5.14 -> 5.15
Intel 12.1.5.339 -> 13.0.0.79
PGI 12.8.0 -> 12.9.0
xt-gcc 4.7.1 -> 4.7.2
CCE 8.1.0 -> 8.1.1
Chapel 1.5.0 -> 1.6.0
ATP 1.5.1 -> 1.5.2


Cray MPICH2 5.5.4 -> 5.5.5
PMI 3.0.1 -> 4.0.0

parallell-netcdf 1.2.0 -> 1.3.1