Updates for ifx support

[mathomp4]

This is a tracking draft PR for ifx support.

I think the last time I tried, many of the GFE libraries (cc @tclune) failed. Probably due to the compiler not quite supporting all the bits of Fortran GFE needs:

/discover/swdev/gmao_SIteam/Baselibs/TmpBaselibs/ESMA-Baselibs-6.2.9-ifx/src/fArgParse/src/StoreConstAction.F90(57): error #5533: Feature found on this line is not yet supported in ifx
      call this%BaseAction%initialize(opt_string_1, opt_string_2, opt_string_3, opt_string_4, &
-----------^
compilation aborted for /discover/swdev/gmao_SIteam/Baselibs/TmpBaselibs/ESMA-Baselibs-6.2.9-ifx/src/fArgParse/src/StoreConstAction.F90 (code 3)

Also, HDF4 had a fit as well with things like:

/usr/bin/ld: cannot find -loopopt=0

[mathomp4]

Already in #44 . Closing