[beignet] 1.1.2-4 had the problem, 1.1.2-5 doesn't, and is no longer listed for autoremoval):
beignet now *is* listed for autoremoval, for (a different) LLVM 3.7 bug, though I haven't had another warning email (yet).
1.1.2-5 dropped the LLVM 3.7 dependency on release architectures, but kept it on kfreebsd (where LLVM 3.8 is not available); might the actual problem be that this check doesn't limit itself to release architectures?