add alternative checksum for codetools 0.2-16 in R 3.6.x easyconfigs

[boegel]

(created using eb --new-pr)
cfr. #11616

[boegel]

@smoors Uploading test reports for all of these would be really painful, and not worth the effort imho.

The diff shown in #11616 confirms that there are no actual code changes in the codetools sources, so this should be good to go.

I'll ask my bot to just re-test a couple of these easyconfigs with --skip and --force-download, that should be sufficient...

[boegel]

@boegelbot please test @ generoso
EB_ARGS=" R-3.6.0-foss-2019a.eb R-3.6.2-intel-2019b.eb R-3.6.3-foss-2020a.eb --force-download --sourcepath /tmp/$USER/pr11736 --skip --rebuild"

[boegelbot]

@boegel: Request for testing this PR well received on generoso

PR test command 'EB_PR=11736 EB_ARGS=" R-3.6.0-foss-2019a.eb R-3.6.2-intel-2019b.eb R-3.6.3-foss-2020a.eb --force-download --sourcepath /tmp/$USER/pr11736 --skip --rebuild" /apps/slurm/default/bin/sbatch --job-name test_PR_11736 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 9786

Test results coming soon (I hope)...

- notification for comment with ID 729553972 processed

Message to humans: this is just bookkeeping information for me,
it is of no use to you (unless you think I have a bug, which I don't).

[boegelbot]

Test report by @boegelbot
SUCCESS
Build succeeded for 3 out of 3 (3 easyconfigs in total)
generoso-c1-s-1 - Linux centos linux 8.2.2004, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/b2cbc89c5ea0ee4a2dbb36ee7405d6a8 for a full test report.

[smoors]

lgtm