Merge pull request #6115 from andrewleech/nRF5XPalGattClient_include_new

NRF5x: Fix `error_t` conflict with gcc std>=gnu++11

Author: 0xc0170

features/FEATURE_BLE/targets/TARGET_NORDIC/TARGET_NRF5/source/nRF5XPalGattClient.cpp

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include <memory>
+#include <new>
 
 #include "nRF5XPalGattClient.h"