bug#34130: Specifying File Variables: mention why can't specify "current file"

[積丹尼 Dan Jacobson]

On (info "(emacs) Specifying File Variables")
at

     # Local Variables:
     # compile-command: "cc foo.c -Dfoo=bar -Dhack=whatever \
     #   -Dmumble=blaah"
     # End:

do also mention why there is absolutely no way to say "<<<current file>>>",
$$$${current_file} etc. if one wanted to, instead of needing to hardwire
the filename (foo.c) of the file (foo.c) into the file (foo.c) itself! Thanks.