filenames dropped if file path is not found

[Trass3r]

The message is still reported by Github but the filename is replace with .github.

##[debug]Dropping file value '/root/build/include/winbase.h'. Path does not exist
##[warning]/root/build/include/winbase.h:1630:10: warning: the current #pragma pack alignment value is modified in the included file [-Wpragma-pack]

[Trass3r]

I think this mostly happens when running an action inside a container. Not much we can do I guess.