Fix a bug in internal resource tracking so that memory map segments really

get unmapped when they are no longer required. This should stop "nm"
from filling up the kernel's vnode table while building "libc.a".

gnu/dist/bfd/libbfd.c

@@ -455,6 +455,7 @@ bfd_get_file_window (abfd, offset, size, windowp, writable)
       i->size = real_size;
       windowp->data = (PTR) ((bfd_byte *) i->data + offset2);
       windowp->size = size;
+      i->refcount = 1;
       i->mapped = 1;
       return true;
     }