update build infrastructure for llvm-16.0.6
Recommit the switch to use llvm-strip on architectures that use ld.lld.ok naddy@, sthen@
Revert previous commit (but leave the man page around); llvm-strip behavesdifferently on files that are hardlinked and this is tripping up ports.requested by naddy@
The binutils strip damages GNU_RELRO on binaries linked by ld.lld on atleast amd64. Fix this by switching to the llvm strip on architecturesthat use ld.lld.ok deraadt@
Update build infrastructure for LLVM 13.0.0.
Add infrastructure to build llvm-objcopy and llvm-objdump.ok kettenis@ sthen@