Fix more lld warnings introduced in #111434 [-Wnontrivial-memaccess]

Author: chapuni

lld/ELF/Arch/ARM.cpp

@@ -1207,7 +1207,7 @@ template <class ELFT> void ObjFile<ELFT>::importCmseSymbols() {
     Defined *sym = reinterpret_cast<Defined *>(make<SymbolUnion>());
 
     // Initialize symbol fields.
-    memset(sym, 0, sizeof(Symbol));
+    memset(static_cast<void *>(sym), 0, sizeof(Symbol));
     sym->setName(CHECK(eSyms[i].getName(stringTable), this));
     sym->value = eSym.st_value;
     sym->size = eSym.st_size;

lld/ELF/SymbolTable.cpp

@@ -56,7 +56,7 @@ void SymbolTable::wrap(Symbol *sym, Symbol *real, Symbol *wrap) {
   // alias for sym, but that could degrade the user experience of some tools
   // that can print out only one symbol for each location: sym is a preferred
   // name than real, but they might print out real instead.
-  memcpy(real, sym, sizeof(SymbolUnion));
+  memcpy(static_cast<void *>(real), sym, sizeof(SymbolUnion));
   real->isUsedInRegularObj = false;
 }
 
@@ -87,7 +87,7 @@ Symbol *SymbolTable::insert(StringRef name) {
   symVector.push_back(sym);
 
   // *sym was not initialized by a constructor. Initialize all Symbol fields.
-  memset(sym, 0, sizeof(Symbol));
+  memset(static_cast<void *>(sym), 0, sizeof(Symbol));
   sym->setName(name);
   sym->partition = 1;
   sym->versionId = VER_NDX_GLOBAL;