add patch for EasyBuild v5.1.2 to fix long-lived bug with toolchain prepare when not using $CPATH

[ocaisa]

The bug has been exposed when using the new options EASYBUILD_MODULE_SEARCH_PATH_HEADERS=include_paths and EASYBUILD_SEARCH_PATH_CPP_HEADERS=include_paths so that CPATH is no longer set with EESSI/2025.06

[ocaisa]

@boegelbot please test @ jsc-zen3

[boegelbot]

@ocaisa: Request for testing this PR well received on jsczen3l1.int.jsc-zen3.fz-juelich.de

PR test command 'if [[ develop != 'develop' ]]; then EB_BRANCH=develop ./easybuild_develop.sh 2> /dev/null 1>&2; EB_PREFIX=/home/boegelbot/easybuild/develop source init_env_easybuild_develop.sh; fi; EB_PR=24376 EB_ARGS= EB_CONTAINER= EB_REPO=easybuild-easyconfigs EB_BRANCH=develop /opt/software/slurm/bin/sbatch --job-name test_PR_24376 --ntasks=8 ~/boegelbot/eb_from_pr_upload_jsc-zen3.sh' executed!

• exit code: 0
• output:

Submitted batch job 8558

Test results coming soon (I hope)...

Details

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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 1 out of 1 (1 easyconfigs in total)
jsczen3c1.int.jsc-zen3.fz-juelich.de - Linux Rocky Linux 9.6, x86_64, AMD EPYC-Milan Processor (zen3), Python 3.9.21
See https://gist.github.com/boegelbot/9e28ad4799ba7cbe7a2e51f50c0d879f for a full test report.

[bedroge]

Lgtm. This fixes a serious bug affecting anyone using a non-default search path configuration, so patching the EasyBuild easyconfig makes sense to me.

[bedroge]

Going in, thanks @ocaisa!