Merge topic 'makefile-progress'

5781cf406f Makefile: Fix progress with non-excluded targets in excluded dirs
89ab14b05b cmGlobalGenerator: Constify IsExcluded use of cmLocalGenerator
0aabf32590 cmGeneratorExpression: Constify use of cmLocalGenerator
88f54fba43 cmLocalGenerator: Avoid unnecessary const-ness propagation

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !10658