[Bug preprocessor/66871] .incbin in .S files does not appear in automatically generated dependencies

[dwmw2 at infradead dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66871

--- Comment #2 from David Woodhouse <dwmw2 at infradead dot org> ---
It would still be extremely useful for it to emit dependencies on those files
which are actually included (after preprocessing).

Otherwise we end up screwing around with preprocessing it and then looking for
'.incbin' and generating the full set of dependencies manually. Which is
horrid.