Sometimes it is necessary to group patchable function entrypoint
records in distinct linker sections. This is the case for some bpf
functions within the linux kernel which shouldn't be visible to
ftrace.
Extend `-Zpatchable-function-entry` to accept an argument of the form
`prefix_nops,total_nops,record_section`, which places all entry
record into a user specified section.
Likewise, extend the `patchable_function_entry` attribute to accept an
optional `section="name"` option to place a function into a specific
section.
This is made possible by llvm attribute `patchable-function-entry-section`
added in llvm 21.
`span_suggestions` is to provide mutually exclusive suggestions. When it was introduced, we made its behavior be that if a single suggestion is given to it, we present the suggestion inline, otherwise in patch format. Changing this to make all of its uses be verbose, as that is closer in intent of output.
Paul Murphy