[Bug driver/64094] "No such file or directory" -> "No such file"

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64094

--- Comment #7 from Andreas Schwab <schwab@linux-m68k.org> ---
In order to be precise trying to open doesnotexist/foo.c should report "no such
directory".