Clarify when we are subsetting the lockfile for 3rdparty dependencies (Cherry-pick of #12435)#12439

Merged

Eric-Arellano merged 1 commit intopantsbuild:2.6.xfrom Eric-Arellano:cp-subset-msg-26

Jul 28, 2021

Commits on Jul 28, 2021

Clarify when we are subsetting the lockfile for 3rdparty dependencies (Cherry-pick of pantsbuild#12435 )
Eric-Arellano
committed