Autogen: Compute additional source header and private header at configure time
This
- refactors and generalizes of methods in
cmQtAutoGenInitializer
and - renames variables and types in
cmQtAutoGen
.
The computation of additional source headers and and private headers for AUTOGEN
is moved from the _autogen
target to the configuration stage. This makes them available for _autogen
target dependency computations at configuration time.