feat(newlib): Add definition of aligned_alloc to heap.c

Add the definition of aligned_alloc to the list of
definitions provided by heap.c.

Note that memalign (strictly equivalent) to aligned_alloc
is already defined in heap.c.

components/newlib/heap.c

@@ -74,6 +74,11 @@ void* memalign(size_t alignment, size_t n)
     return heap_caps_aligned_alloc(alignment, n, MALLOC_CAP_DEFAULT);
 }
 
+void* aligned_alloc(size_t alignment, size_t n)
+{
+    return heap_caps_aligned_alloc(alignment, n, MALLOC_CAP_DEFAULT);
+}
+
 int posix_memalign(void **out_ptr, size_t alignment, size_t size)
 {
     if (size == 0) {