Fix sentinel regexes

I do not know when LatexMk and AUCTeX changed, but the existing sentinel regexes do not work. The changes are:

* **'name' becomes 'mode-name'**: TeX-synchronous-sentinel in TeX-run-TeX uses 'mode-name' for the post-mortem tag instead of 'name'
* **'^Run number...' is prefixed with 'Latexmk: '**: That is how the output is setup in my run using TeXLive 2013