Add trivial new[] and delete[] operators (Justin R. Cutler)

Fixes #73
Fixes #883

hardware/arduino/cores/arduino/new.cpp

@@ -5,10 +5,20 @@ void * operator new(size_t size)
   return malloc(size);
 }
 
+void * operator new[](size_t size)
+{
+  return malloc(size);
+}
+
 void operator delete(void * ptr)
 {
   free(ptr);
-} 
+}
+
+void operator delete[](void * ptr)
+{
+  free(ptr);
+}
 
 int __cxa_guard_acquire(__guard *g) {return !*(char *)(g);};
 void __cxa_guard_release (__guard *g) {*(char *)g = 1;};

hardware/arduino/cores/arduino/new.h

@@ -8,7 +8,9 @@
 #include <stdlib.h>
 
 void * operator new(size_t size);
-void operator delete(void * ptr); 
+void * operator new[](size_t size);
+void operator delete(void * ptr);
+void operator delete[](void * ptr);
 
 __extension__ typedef int __guard __attribute__((mode (__DI__)));