Fix compilation Delphi2007 and DelphiXE

I noticed that projects failed to compile for me cause of wrong paths

Related pull request: https://github.com/Convey-Compliance/mongo-delphi-driver/pull/44
Your link points to mongo-delphi-driver-build project, this commit seems to be ok http://screencloud.net/v/m9wW
![fede915e0e33f9c85776e6c77a20db40](https://cloud.githubusercontent.com/assets/2393951/3640377/954286da-109e-11e4-8f42-58de0f0d4b9d.png)

I don't see mongo-delphi-driver-build in my list of jenkins jobs, but It didn't compile for me because of invalid path's in mongo-delphi-driver .dpr files.