Add ASSERTATION_FAILED error code

Author: MateuszMaz

platform/mbed_assert.c

@@ -29,5 +29,5 @@ void mbed_assert_internal(const char *expr, const char *file, int line)
     char error_message[error_message_length];
     snprintf(error_message, error_message_length, "%s%s", error_description, expr);
 
-    mbed_error(MBED_ERROR_INVALID_ARGUMENT, error_message, 0, file, line);
+    mbed_error(MBED_ERROR_ASSERTATION_FAILED, error_message, 0, file, line);
 }

platform/mbed_error.h

@@ -780,7 +780,8 @@ typedef enum _mbed_error_code {
     MBED_DEFINE_SYSTEM_ERROR(BLE_NO_FRAME_INITIALIZED, 65),             /* 321      BLE No frame initialized */
     MBED_DEFINE_SYSTEM_ERROR(BLE_BACKEND_CREATION_FAILED, 66),          /* 322      BLE Backend creation failed */
     MBED_DEFINE_SYSTEM_ERROR(BLE_BACKEND_NOT_INITIALIZED, 67),          /* 323      BLE Backend not initialized */
-
+    MBED_DEFINE_SYSTEM_ERROR(ASSERTATION_FAILED, 68),                   /* 324      Assertation Failed */
+    
     //Everytime you add a new system error code, you must update
     //Error documentation under Handbook to capture the info on
     //the new error status/codes