append keyword on compile-file

["Timothy P. Daly" <DALY@ibm.com>]

Has anyone implemented a compile-file extension that would allow
the fast load file to be updated?

I would like to be able to say:

(COMPILE-FILE "foo.lisp" :APPEND "foo.bin")

with the effect that the compiler output would append its output
to the existing file rather than create a new file. The ultimate
effect of loading the FOO.BIN file should be that of loading
the original fast load file followed by the new fast load file.

This would enable me to supercede functions that exist in a fast load
file without recompiling the world.