Merge topic 'link-flags'

d592558b8b cmLocalGenerator: Drop no-op link flag placeholder infrastructure
67639002ad Ninja,Makefile: Drop now-unused placeholders from link rule variables
951e4d3f62 Ninja,Makefile: Move builtin linker flags to <LINK_FLAGS> placeholder
6b618c6079 cmLocalGenerator: Clarify MODULE link flags placeholder population
c52a654aa1 cmLocalGenerator: Improve formatting of rule placeholder variable list
37cf9941ed UseEcos: Add missing placeholder in rules to link executables
fa61be5bc4 Embarcadero,OpenWatcom: Clear unused flags for creating shared libraries
124e40947c CMakeCommonLanguageInclude: Do not unset MODULE library flags when empty
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !10869