Add documentation for cfg = "target".
Add documentation for cfg = "target".

PiperOrigin-RevId: 154441586

dslomov/bazel-windows,safarmer/bazel,davidzchen/bazel,ButterflyNetwork/bazel,aehlig/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,safarmer/bazel,meteorcloudy/bazel,perezd/bazel,dslomov/bazel,dropbox/bazel,twitter-forks/bazel,juhalindfors/bazel-patches,spxtr/bazel,dslomov/bazel-windows,spxtr/bazel,meteorcloudy/bazel,dslomov/bazel-windows,akira-baruah/bazel,perezd/bazel,ButterflyNetwork/bazel,damienmg/bazel,aehlig/bazel,werkt/bazel,damienmg/bazel,spxtr/bazel,dslomov/bazel,akira-baruah/bazel,bazelbuild/bazel,dslomov/bazel-windows,variac/bazel,meteorcloudy/bazel,damienmg/bazel,variac/bazel,spxtr/bazel,dropbox/bazel,snnn/bazel,variac/bazel,snnn/bazel,akira-baruah/bazel,variac/bazel,meteorcloudy/bazel,bazelbuild/bazel,dropbox/bazel,ulfjack/bazel,dropbox/bazel,cushon/bazel,dropbox/bazel,werkt/bazel,twitter-forks/bazel,perezd/bazel,aehlig/bazel,werkt/bazel,dslomov/bazel,katre/bazel,katre/bazel,cushon/bazel,spxtr/bazel,werkt/bazel,damienmg/bazel,aehlig/bazel,perezd/bazel,davidzchen/bazel,safarmer/bazel,damienmg/bazel,akira-baruah/bazel,ButterflyNetwork/bazel,perezd/bazel,katre/bazel,davidzchen/bazel,twitter-forks/bazel,snnn/bazel,spxtr/bazel,dslomov/bazel,davidzchen/bazel,cushon/bazel,ulfjack/bazel,davidzchen/bazel,snnn/bazel,katre/bazel,twitter-forks/bazel,dslomov/bazel,dslomov/bazel-windows,bazelbuild/bazel,dropbox/bazel,davidzchen/bazel,juhalindfors/bazel-patches,safarmer/bazel,ulfjack/bazel,juhalindfors/bazel-patches,davidzchen/bazel,meteorcloudy/bazel,safarmer/bazel,variac/bazel,katre/bazel,aehlig/bazel,spxtr/bazel,ulfjack/bazel,twitter-forks/bazel,werkt/bazel,dslomov/bazel,safarmer/bazel,juhalindfors/bazel-patches,perezd/bazel,ulfjack/bazel,juhalindfors/bazel-patches,twitter-forks/bazel,meteorcloudy/bazel,variac/bazel,perezd/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,ulfjack/bazel,dslomov/bazel,katre/bazel,aehlig/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,werkt/bazel,snnn/bazel,cushon/bazel,twitter-forks/bazel,akira-baruah/bazel,ulfjack/bazel,snnn/bazel,bazelbuild/bazel,variac/bazel,aehlig/bazel,snnn/bazel,damienmg/bazel,cushon/bazel,cushon/bazel,juhalindfors/bazel-patches,damienmg/bazel,bazelbuild/bazel,akira-baruah/bazel,juhalindfors/bazel-patches