Clarify comment.

core/unix/module_elf.h

@@ -146,7 +146,7 @@ elf_loader_map_file(elf_loader_t *elf, bool reachable);
  * called after reading program headers with elf_loader_read_phdrs() or the
  * elf_loader_read_headers() shortcut.  All image mappings are done via the
  * provided function pointers.  If a remap_func is specified, it is used when
- * we must unmap a certain part of a prior reserved anonymous map and use it
+ * we must unmap a certain part of a prior reserved address range and use it
  * for another mapping; unlike unmap_func followed by map_func, remap_func
  * is expected to do this atomically to mitigate risk of that region getting
  * mmaped by another thread between the unmap and map events (i#7192). On