[llvm-readobj][ELF] Print the relocation of each --stack-sizes entry
In a relocatable file, print the relocation that applies to each
.stack_sizes entry as a Relocation object in the LLVM and JSON output,
with the same fields as in --call-graph-info. The code that prints the
object is shared with --call-graph-info, so the addend of a SHT_REL
relocation is again the value stored in the address field.
Assisted-by: Gemini