Autogen contains code to forward dependencies from an origin target
to its associated <origin>_autogen target. This code also contains a
check to skip forwarding a dependency if it does not appear in the
dependency graph for all configured build types.
This is done by counting the number of times a dependency appears in
the graph for each configured build type.
Unfortunately the code did not account for the case when a dependency
appears more than once in the link graph for a single build type. This
means that for a single-config build, if the same dependency is linked
twice, the dependency will be skipped altogether.
This can lead to build errors in a project where a hypothetical App
target depends on a Lib target, and thus expects App_autogen to depend
on Lib_autogen and any of its dependencies, but the latter is skipped.
Fix this by incrementing the count of a target in the dependency graph
only once per build type.
Fixes: #26700
2b314e9009