improve sanity_check_paths for AMD-LibM

[boegel]

(created using eb --new-pr)

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 2 out of 2 (2 easyconfigs in total)
node3501.doduo.os - Linux RHEL 8.2, x86_64, AMD EPYC 7552 48-Core Processor (zen2), Python 3.6.8
See https://gist.github.com/2be93ae1409956a067cecb0750a0fcf6 for a full test report.

[boegel]

@boegelbot please test @ generoso

[boegelbot]

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

PR test command 'EB_PR=11933 EB_ARGS= /apps/slurm/default/bin/sbatch --job-name test_PR_11933 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 12343

Test results coming soon (I hope)...

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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)
generoso-c1-s-2 - 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/3c6213c005247b13c294160e04deee39 for a full test report.

[migueldiascosta]

Test report by @migueldiascosta
SUCCESS
Build succeeded for 2 out of 2 (2 easyconfigs in total)
sms - Linux centos linux 7.6.1810, x86_64, AMD EPYC 7601 32-Core Processor (zen), Python 2.7.5
See https://gist.github.com/70c1afb6f72c95b2f4a1eb777e16783f for a full test report.

[migueldiascosta]

lgtm

[migueldiascosta]

Going in, thanks @boegel!