Forge enforces logo files being in the root of the jar, one or more of your mods broke this rule.
Provide debug.log and we'll see if it identifies the mod(s) in question.
Oh, took me too long to see what's wrong here. I blame Eclipse. (I use Intellij)
They WERE generated, but Eclipse won't show them in the dropdown until you've already used them once from the full list. (Click "Run Configurations...")