devel/llvm16: update to 16.0.6 release

Change the lite flavor to default to BE_FREEBSD rather than BE_NATIVE to
allow its use in cross-build CI pipelines.

Backport fix for LLVM bug 61396. [0] This fixes miscompilation of gcc
on 32-bit arm.

PR: 271992 [0]
Reported by: jfc@mit.edu [0]