Implemented fix so that netcdf output works on Ubuntu

[davidclemenssewall]

PR checklist

• [X ] Short (1 sentence) summary of your PR:
  In Macros.conda_linux, add paths to compiled NetCDF module files and libraries.
• [X ] Developer(s):
  Philippe Blaine provided this fix, David Clemens-Sewall just ran tests and submitted PR.
• [X ] Suggest PR reviewers from list in the column to the right.
  Philippe Blaine, Dave Bailey, or Tony Craig
• [X ] Please copy the PR test results link or provide a summary of testing completed below.
  Icepack base_suite 128 of 128 tests passed. CICE quick_suite 16 of 16 tests passed.
• How much do the PR code changes differ from the unmodified code?
  • [X ] bit for bit
  • different at roundoff level
  • more substantial
• Does this PR create or have dependencies on CICE or any other models?
  • Yes
  • [X ] No
• Does this PR add any new test cases?
  • Yes
  • [X ] No
• Is the documentation being updated? ("Documentation" includes information on the wiki or in the .rst files from doc/source/, which are used to create the online technical docs at https://readthedocs.org/projects/cice-consortium-cice/.)
  • Yes
  • [X ] No, does the documentation need to be updated at a later time?
    • Yes
    • [X ] No
• Please provide any additional information or relevant details below:

[phil-blain]

Ideally the commit message would also be changed (since this is a 1 commit PR, the commit message will be used verbatim when squash-merging [1]) to be more descriptive, maybe something like this:

machines: conda_linux: fix NetCDF-enabled build

The Makefile macro file for conda on Linux was not updated when Icepack learned
to do NetCDF output in e1f3574 (Netcdf History Capability (#368), 2021-08-30),
only the macOS one was updated. Tweak the Linux build similarly.

@davidclemenssewall , you could do that with

git commit --amend
# rewrite message, save
git push --force

---

[1] at least that's the default behaviour, @apcraig I don't know if this setting is changed for the Icepack repo so that the PR title is always used ?...

[davidclemenssewall]

@phil-blain Done.

[phil-blain]

Thank you @davidclemenssewall !