freerdp: fold .inc into .bb

* currently it's broken again
  ERROR: freerdp-1.2.5+gitrAUTOINC+62da9d28c6-r0 do_package: QA Issue: freerdp: Files/directories were installed but not shipped in any package:
    /usr/bin
  Please set FILES such that these items are packaged. Alternatively if they are unneeded, avoid installing them or delete them within do_install.
  freerdp: 1 installed and not shipped files. [installed-vs-shipped]

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>