PR11514 Only expand kallsyms once for kprobe_derived_probe_group.

PR11514 Only expand kallsyms once for kprobe_derived_probe_group.

kprobe_register is really expensive when used for multiple symbol
based probes since it will call kallsyms_expand_symbol over and over
to uncompress the kernel symbol table. So flip the comparison loop
inside out by looping once over the kernel symbol table.

* tapsets.cxx (kprobe_derived_probe_group::emit_module_decls): Declare
  kprobe_resolve helper function.
  (kprobe_derived_probe_group::emit_module_init): Call kprobe_resolve
  through kallsyms_on_each_symbol. Never register through symbol name,
  just check that address has been filled in by kprobe_resolve.