[LLDB][ObjectFileELF] Correct the return type of Reloc{Offset,Addend}32

This is a follow up of D145550.

I think Reloc{Type,Symbol}{32,64} can keep unchanged as they are not
directly returning a field of the ELFRel[a] struct.

Reviewed By: DavidSpickett

Differential Revision: https://reviews.llvm.org/D145571

(cherry picked from commit 27705f4)

Author: SixWeining

lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp

@@ -114,11 +114,11 @@ class ELFRelocation {
 
   static unsigned RelocSymbol64(const ELFRelocation &rel);
 
-  static unsigned RelocOffset32(const ELFRelocation &rel);
+  static elf_addr RelocOffset32(const ELFRelocation &rel);
 
   static elf_addr RelocOffset64(const ELFRelocation &rel);
 
-  static unsigned RelocAddend32(const ELFRelocation &rel);
+  static elf_sxword RelocAddend32(const ELFRelocation &rel);
 
   static elf_sxword RelocAddend64(const ELFRelocation &rel);
 
@@ -185,7 +185,7 @@ unsigned ELFRelocation::RelocSymbol64(const ELFRelocation &rel) {
     return ELFRela::RelocSymbol64(*rel.reloc.get<ELFRela *>());
 }
 
-unsigned ELFRelocation::RelocOffset32(const ELFRelocation &rel) {
+elf_addr ELFRelocation::RelocOffset32(const ELFRelocation &rel) {
   if (rel.reloc.is<ELFRel *>())
     return rel.reloc.get<ELFRel *>()->r_offset;
   else
@@ -199,7 +199,7 @@ elf_addr ELFRelocation::RelocOffset64(const ELFRelocation &rel) {
     return rel.reloc.get<ELFRela *>()->r_offset;
 }
 
-unsigned ELFRelocation::RelocAddend32(const ELFRelocation &rel) {
+elf_sxword ELFRelocation::RelocAddend32(const ELFRelocation &rel) {
   if (rel.reloc.is<ELFRel *>())
     return 0;
   else