Adding new.cpp as in F1 core.

This is to avoid libstdc++ being pulled in when new() is used.
Already included in the F1 in 2016.
Discussed on this thread:
http://www.stm32duino.com/viewtopic.php?f=39&t=2460&p=33163

Author: victorpv

STM32F4/cores/maple/new.cpp

@@ -0,0 +1,35 @@
+/*
+  Copyright (c) 2014 Arduino.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include <stdlib.h>
+
+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);
+}