Philippe 19/01/2017: OpenACC: gradient + shuman: ported modifications to device versions of subroutines

=> compute correctly Hector testcase on NVIDIA (WENO 3)

WARNING: this version does compile but results are not yet correct

Merge branch 'MNH-53-branch' of mesonh2.aero.obs-mip.fr:/gitrepos/MNH-git_open_source-lfs into MNH-53-branch

Juan 12/12/2016: job_make_examples_CRAY_cca,job_make_mesonh_CRAY_cca , switch to default ifort compiler

Juan 12/12/2016: Rules.LXcray.mk , for problem with *.mod generation, add -em -ef for cdf/grib_api lib creation

Juan 12/12/2016: configure, for ECMWF , switch by default to new ifort compiler, old cray cdt/1.15_8.2.7 in 2nd choose

Merge branch 'MNH-53-branch' of mesonh2.aero.obs-mip.fr:/gitrepos/MNH-git_open_source-lfs into MNH-53-branch

(cherry picked from commit 1a7714fd)

(cherry picked from commit a7a6578a)

Merge branch 'MNH-53-branch' of mesonh2.aero.obs-mip.fr:/gitrepos/MNH-git_open_source-lfs into MNH-53-branch

Philippe 09/12/2016: re-added #ifndef MNH_SP4 to prevent problems when compiling on Blue Gene/Q with -qautodbl=4