[LLD] [ELF] Add parentheses to silence a GCC warning. NFC.

[mstorsjo]

Summary

This silences the following warning:

../tools/lld/ELF/SyntheticSections.cpp:1596:48: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
1596 | assert((index != 0 || type != target->gotRel && type != target->pltRel ||

lld/ELF/SyntheticSections.cpp

int64_t DynamicReloc::computeAddend() const {
   llvm_unreachable("Unknown DynamicReloc::Kind enum");
 }
 
 uint32_t DynamicReloc::getSymIndex(SymbolTableBaseSection *symTab) const {
   if (!needsDynSymIndex())
     return 0;
 
   size_t index = symTab->getSymbolIndex(sym);
-  assert((index != 0 || type != target->gotRel && type != target->pltRel ||
+  assert((index != 0 || (type != target->gotRel && type != target->pltRel) ||
           !mainPart->dynSymTab->getParent()) &&
          "GOT or PLT relocation must refer to symbol in dynamic symbol table");
   return index;
 }
 
 RelocationBaseSection::RelocationBaseSection(StringRef name, uint32_t type,
                                              int32_t dynamicTag,
                                              int32_t sizeDynamicTag,