Revert "gbuild: do not let generated source files depend on headers"
Revert "gbuild: do not let generated source files depend on headers"

There is a reason for that dependency. I will have to come up with
something better later.

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core