[Skiboot] [PATCH] Makefile: Use '--ignore-errors unused' with lcov

[Reza Arbab]

On Fri, Aug 02, 2024 at 01:29:42PM -0500, Reza Arbab wrote:
>We are a bit overzealous in specifying arguments to 'lcov -r', listing
>files (via wildcard) that are not actually in the tracefile.
>
>This is harmless, but will cause newer lcov to generate an error message
>of type 'unused'. Reduce this error to a warning.

Applied to master.

-- 
Reza Arbab