Fix Clang deprecated builtins

It seems that Clang and GCC have different interpretations of certain builtins. So this PR fixes the "deprecated" builtins for Clang, but keeps them for GCC.

Author: adamscott

include/godot_cpp/templates/cowdata.hpp

@@ -212,7 +212,11 @@ void CowData<T>::_unref(void *p_data) {
 }
 // clean up
 
+#ifdef __clang__
+if (!__is_trivially_destructible(T)) {
+#else
 if (!__has_trivial_destructor(T)) {
+#endif
 uint32_t *count = _get_size();
 T *data = (T *)(count + 1);
 
@@ -247,7 +251,11 @@ uint32_t CowData<T>::_copy_on_write() {
 T *_data = (T *)(mem_new);
 
 // initialize new elements
+#ifdef __clang__
+if (__is_trivially_copyable(T)) {
+#else
 if (__has_trivial_copy(T)) {
+#endif
 memcpy(mem_new, _ptr, current_size * sizeof(T));
 
 } else {
@@ -310,7 +318,11 @@ Error CowData<T>::resize(int p_size) {
 
 // construct the newly created elements
 
+#ifdef __clang__
+if (!__is_trivially_constructible(T)) {
+#else
 if (!__has_trivial_constructor(T)) {
+#endif
 T *elems = _get_data();
 
 for (int i = *_get_size(); i < p_size; i++) {
@@ -321,7 +333,11 @@ Error CowData<T>::resize(int p_size) {
 *_get_size() = p_size;
 
 } else if (p_size < current_size) {
+#ifdef __clang__
+if (!__is_trivially_destructible(T)) {
+#else
 if (!__has_trivial_destructor(T)) {
+#endif
 // deinitialize no longer needed elements
 for (uint32_t i = p_size; i < *_get_size(); i++) {
 T *t = &_get_data()[i];