Backport "perl: Do not build in parallel" to release-7.4.0alpha2-shsw
I see occasional build failures on the release-7.4.0alpha2-shsw
branch with the following error:
ERROR: package/feeds/openwrt_packages/perl failed to build.
Some recent nightly examples that I found in my inbox:
- 2024-10-21: https://dev.iopsys.eu/devops/iopsyswrt/-/jobs/510872
- 2024-10-09: https://dev.iopsys.eu/devops/iopsyswrt/-/jobs/504169
- 2024-10-01: https://dev.iopsys.eu/devops/iopsyswrt/-/jobs/500324
Looks like we need to backport disabling parallel building for the perl
package to this branch as well.