[Qa-jenkins-scm] arm64_28/2927 on codethink-sled11-arm64.debian.net ran into diskspace problems

[jenkins at jenkins.debian.net]

https://jenkins.debian.net/job/reproducible_builder_arm64_28/2927/console hit diskspace issues with llvm-toolchain-3.8 on testing/arm64 on codethink-sled11-arm64.debian.net, sleeping 60m.