Constify handling of target dependencies.
Constify handling of link targets.
Constify cmGeneratorTarget access.
cmLocalGenerator: Constify target definitions access
Autogen: Split AutoRcc handling into two methods

The initialize method changes the target, whereas the setup method
does not.
Constify autogen handling.
Merge topic 'constify' into next

f42d7d1 Constify autogen handling.
fbdd66c Autogen: Split AutoRcc handling into two methods
4adbb31 cmLocalGenerator: Constify target definitions access
f2e8061 Constify cmGeneratorTarget access.
785e56b Constify handling of link targets.
890360f Constify handling of target dependencies.