func (sb *SymbolBuilder) SetRelocAdd(i int, a int64) {
	sb.relocs[i].SetAdd(a)
}

// Add n relocations, return a handle to the relocations.
func (sb *SymbolBuilder) AddRelocs(n int) Relocs {
	sb.relocs = append(sb.relocs, make([]goobj.Reloc, n)...)
	return sb.l.Relocs(sb.symIdx)
}

// Add a relocation with given type, return its handle and index
// (to set other fields).