tail: print inaccessible message when symlink target changes

[ChrisDryden]

This is a fix for the debug GNU test, I thought this was already fixed in a prior PR I made to add the flag and the inotify symbols but it turns out we were missing a error message when updating a symlink and the symlinks permissions change. This is the only error message missing from the tail/debug gnu test.

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/pr/bounded-memory. tests/pr/bounded-memory is passing on 'main'. Maybe you have to rebase?

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/pr/bounded-memory is no longer failing!
Congrats! The gnu test tests/tail/debug is no longer failing!
Note: The gnu test tests/tail/inotify-dir-recreate is now being skipped but was previously passing.
Note: The gnu test tests/tail/inotify-only-regular is now being skipped but was previously passing.

[ChrisDryden]

Almost there, this should fix the flakyness in the tail/symlink test and also fix the tail/debug

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/tail/symlink. tests/tail/symlink is passing on 'main'. Maybe you have to rebase?
Congrats! The gnu test tests/tail/debug is no longer failing!