jhm: Add a "Compile C/C++" job.

Includes misc. changes to make things work with more jobs / fix misc. bugs uncovered.
jhm: Fix work finder bugs

 - Reverse backwards bool in fast exit of TWorkFinder::Queue
 - Make working have a tighter definition (We loop needlessly less)
 - Fix indentation of TWorkFinder::ProcessReady
jhm/job/dep: Remove old comments
jhm: Add a link job. Gets basic binaries compiling.