[Wien] Compiling wien2wannier with ifx

[Gavin Abo]

Another user brought to my attention that the wien2wannier executable 
files (w2w and w2wc in SRC_w2w as well as wplot and wplotc in SRC_wplot) 
with WIEN2k 24.1 were not compiling with ifx.  A solution seems to be to 
take the else if not equal (i.e., else ifneq) statement block for ifort 
in the SRC_w2w/make.sys file and create a copy of it instead of the 
make.sys.  Then, replace ifort in the copied statement to ifx.

I've made a make.sys.patch file for that, which should be available at 
[1], if anyone else would like to try it out.

[1] https://github.com/gsabo/WIEN2k-Patches/tree/master/24.1

Best Regards,

Gavin
WIEN2k user