add patch for GROMACS 2019.3 easyconfigs using CMake 3.15.3 to fix CPU detection

[akesandgren]

(created using eb --new-pr)

This fixes the issue reported in easybuilders/easybuild-easyblocks#2608

[akesandgren]

@boegelbot Please test @ generoso

[boegelbot]

@akesandgren: Request for testing this PR well received on login1

PR test command 'EB_PR=14212 EB_ARGS= /opt/software/slurm/bin/sbatch --job-name test_PR_14212 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 7150

Test results coming soon (I hope)...

- notification for comment with ID 952196889 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 2 out of 2 (2 easyconfigs in total)
cnx1 - Linux rocky linux 8.4, x86_64, Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz (haswell), Python 3.6.8
See https://gist.github.com/1c58e4935babbcd49745078d15d7696f for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 2 out of 2 (2 easyconfigs in total)
node2635.swalot.os - Linux centos linux 7.9.2009, x86_64, Intel(R) Xeon(R) CPU E5-2660 v3 @ 2.60GHz (haswell), Python 3.6.8
See https://gist.github.com/2074fc8527df9b29eb53ee8051643480 for a full test report.

[boegel]

lgtm

[boegel]

Going in, thanks @akesandgren!