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

Author: chapuni

lld/ELF/Symbols.h

@@ -75,7 +75,7 @@ class Symbol {
 
   // The default copy constructor is deleted due to atomic flags. Define one for
   // places where no atomic is needed.
-  Symbol(const Symbol &o) { memcpy(this, &o, sizeof(o)); }
+  Symbol(const Symbol &o) { memcpy(static_cast<void *>(this), &o, sizeof(o)); }
 
 protected:
   const char *nameData;

llvm/include/llvm/Support/Endian.h

@@ -58,7 +58,7 @@ template <typename value_type, std::size_t alignment = unaligned>
 [[nodiscard]] inline value_type read(const void *memory, endianness endian) {
   value_type ret;
 
-  memcpy(&ret,
+  memcpy(static_cast<void *>(&ret),
          LLVM_ASSUME_ALIGNED(
              memory, (detail::PickAlignment<value_type, alignment>::value)),
          sizeof(value_type));

llvm/lib/ExecutionEngine/ExecutionEngine.cpp

@@ -1056,7 +1056,7 @@ void ExecutionEngine::StoreValueToMemory(const GenericValue &Val,
     *((double*)Ptr) = Val.DoubleVal;
     break;
   case Type::X86_FP80TyID:
-    memcpy(Ptr, Val.IntVal.getRawData(), 10);
+    memcpy(static_cast<void *>(Ptr), Val.IntVal.getRawData(), 10);
     break;
   case Type::PointerTyID:
     // Ensure 64 bit target pointers are fully initialized on 32 bit hosts.