Malloc tests

[zack leung]

Helllo  ,
I'm working on a patch for malloc_get_usable size right now so far i have
this test case for malloc, I just make sure that the value is null and i
just malloc an int and then  i make a call to the function malloc_usable
size and then i compare it like this.

static void test_malloc_usablesize( void ){
   int * a = malloc(sizeof(int));
   rtems_test_assert((int) malloc_usable_size(a) == 12);
   free (a);

   int * b = NULL;
   rtems_test_assert( 0 == malloc_usable_size(b));
   free(b);


}
Is there a good amount of storage to allocate? Also I heard someone made a
formatter for rtems source files.  Can someone tell me how to use it and if
it is on the main branch?