FindLATEX: Enhancement with support for latexmk

Hello,

how do you think about adding support for latexmk to the module FindLATEX?

latexmk is a very convenient command which makes it easy to use latex even for beginners.
In my case it is the easiest way to re-run pdflatex as long as needed to get all references right without scripting it myself.
Using latexmk this is only a custom target with one command.

Adding the following to FindLATEX.cmake would be sufficient:

Did you mean to post some code?