Feature/add preprocess target

[suvarchal]

• fix minor typo that ended preprocessor def with !
• add source preprocessing target that makes it easier to debug all our nested/convoluted defs like openmp/openacc.

to use preprocessor source target go to build direcory after configure,
cd build ;cmake --build . --target preprocess-sources to get pre-processes sources in dir build/preprocess

[basava70]

I did my usual
./configure.sh levante.nvhpc -DENABLE_OPENACC=ON -DDISABLE_OPENACC_ATOMICS=OFF 2>&1 | tee build_log.txt

and then cd build
cmake --build . --target preprocess-sources > preprocess
I go this error message.
Any ideas ?? @suvarchal

nvfortran-Warning-The option -Mipa has been deprecated and is ignored.

NVFORTRAN-F-0906-Can't find include file netcdf.inc (/work/ab0995/a270232/main_branch_fesom/fesom2_openacc_test/src/gen_events.F90: 98)
gmake[3]: *** [src/CMakeFiles/preprocess-sources.dir/build.make:105: preprocess-sources] Error 2
gmake[2]: *** [CMakeFiles/Makefile2:199: src/CMakeFiles/preprocess-sources.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:206: src/CMakeFiles/preprocess-sources.dir/rule] Error 2
gmake: *** [Makefile:208: preprocess-sources] Error 2