define $GTKDOCIZE as 'echo' before generating configure script for recent HarfBuzz versions

[boegel]

(created using eb --new-pr)
fixes #16567

[boegel]

@boegelbot please test @ generoso

[boegelbot]

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

PR test command 'EB_PR=16570 EB_ARGS= EB_CONTAINER= /opt/software/slurm/bin/sbatch --job-name test_PR_16570 --ntasks=4 ~/boegelbot/eb_from_pr_upload_generoso.sh' executed!

• exit code: 0
• output:

Submitted batch job 9451

Test results coming soon (I hope)...

- notification for comment with ID 1305819141 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)
cns1 - Linux Rocky Linux 8.5, x86_64, Intel(R) Xeon(R) CPU E5-2667 v3 @ 3.20GHz (haswell), Python 3.6.8
See https://gist.github.com/3bc1deacb62bad14d50cf10dd880bd7c for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 3 out of 3 (3 easyconfigs in total)
node3135.skitty.os - Linux RHEL 8.4, x86_64, Intel(R) Xeon(R) Gold 6140 CPU @ 2.30GHz (skylake_avx512), Python 3.6.8
See https://gist.github.com/942c49b7c496664abf85384c03cc11a7 for a full test report.

[jfgrimm]

Test report by @jfgrimm
SUCCESS
Build succeeded for 3 out of 3 (3 easyconfigs in total)
node146.pri.viking.alces.network - Linux CentOS Linux 7.9.2009, x86_64, Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz (skylake_avx512), Python 3.6.8
See https://gist.github.com/9b06d4fe253f50adae4e60884f63ba19 for a full test report.