ashmem: Emit error if readlink() fails in is_memfd_fd()

Emitting an error if readlink() fails in is_memfd_fd() is useful for
debugging.

Bug: 111903542
Change-Id: I74c6c3f7fb2aaddc07d305e17b5b9997f6aad195
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>
1 file changed