Import assert fix from mbed v3.

hal/targets/hal/TARGET_NORDIC/TARGET_NRF5/sdk/libraries/util/nrf_assert.h

@@ -1,9 +1,32 @@
 /*
- * Copyright (c) 2006 Nordic Semiconductor. All Rights Reserved.
+ * Copyright (c) Nordic Semiconductor ASA
+ * All rights reserved.
  *
- * The information contained herein is confidential property of Nordic Semiconductor. The use,
+ * Redistribution and use in source and binary forms, with or without modification,
- * copying, transfer or disclosure of such information is prohibited except by express written
+ * are permitted provided that the following conditions are met:
- * agreement with Nordic Semiconductor.
+ *
+ *   1. Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright notice, this
+ *   list of conditions and the following disclaimer in the documentation and/or
+ *   other materials provided with the distribution.
+ *
+ *   3. Neither the name of Nordic Semiconductor ASA nor the names of other
+ *   contributors to this software may be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
 
@@ -18,6 +41,10 @@
 #include "nrf.h"
 #include "app_error.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #if defined(DEBUG_NRF) || defined(DEBUG_NRF_USER)
 
 /** @brief Function for handling assertions.
@@ -53,8 +80,14 @@ else                                                                          \
     assert_nrf_callback((uint16_t)__LINE__, (uint8_t *)__FILE__);             \
 }
 #else
+#ifndef ASSERT
 #define ASSERT(expr) //!< Assert empty when disabled
 __WEAK void assert_nrf_callback(uint16_t line_num, const uint8_t *file_name);
+#endif
 #endif /* defined(DEBUG_NRF) || defined(DEBUG_NRF_USER) */
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* NRF_ASSERT_H_ */