Add placement new operator

Author: Pharap

cores/arduino/new.cpp

@@ -26,6 +26,10 @@ void *operator new[](size_t size) {
   return malloc(size);
 }
 
+void * operator new(size_t size, void * ptr) {
+  return ptr;
+}
+
 void operator delete(void * ptr) {
   free(ptr);
 }

cores/arduino/new.h

@@ -23,6 +23,7 @@
 
 void * operator new(size_t size);
 void * operator new[](size_t size);
+void * operator new(size_t size, void * ptr);
 void operator delete(void * ptr);
 void operator delete[](void * ptr);