bug#12274: 24.2; awk-mode indentation failure

[Leo]

1. Emacs -q and change to a new buffer
2. M-x awk-mode
3. Type: NR >= 3
4. Type return and then tab to indent

The newline is indented.

AWK mode fails to recognise NR >= 3 as a pattern-action pair where
action is omitted. Statements in awk need no ; to terminate.

Leo