Added object-name c-string getter function to basic objects so they can be referenced to free if dynamically created. (#754)

* Added basic object-name get for ASCII names to enable free if they were dynamically created. Added unit testing to validate the basic object ASCII object-name API.

* Removed static scope on character array used for name since the array gets copied into characterstring array and static is not needed.

src/bacnet/basic/object/bacfile.h

@@ -29,6 +29,7 @@ extern "C" {
         const int **pRequired,
         const int **pOptional,
         const int **pProprietary);
+
     BACNET_STACK_EXPORT
     bool bacfile_object_name(
         uint32_t object_instance,
@@ -38,6 +39,10 @@ extern "C" {
         uint32_t object_instance,
         char *new_name);
     BACNET_STACK_EXPORT
+    const char * bacfile_name_ansi(
+        uint32_t object_instance);
+
+    BACNET_STACK_EXPORT
     bool bacfile_valid_instance(
         uint32_t object_instance);
     BACNET_STACK_EXPORT