We don't support generating code for ptrauth builtins with generic
inputs (or non-constant inputs). We rely on specialization/inlining for
such code to work.
After a recent commit (#68843 ) code in IRGen keeps internal unreferenced
functions alive for debugging purposes.
This is a problem for the generic functions in PtrAuth.swift using
ptrauth builtins.
Opt out of this new behavior by sprinkling some pixie dust.
Fixes debug swift standard library builds targeting arm64e.
rdar://117411740
