Add exports_files declaration for some .bzl's in @bazel_tools
Add exports_files declaration for some .bzl's in @bazel_tools

This is needed so rules_python can run stardoc on .bzl files that depend on or mirror parts of these @bazel_tools files. See bazelbuild/rules_python#213.

RELNOTES: None
PiperOrigin-RevId: 260496745

dslomov/bazel-windows,perezd/bazel,akira-baruah/bazel,werkt/bazel,akira-baruah/bazel,meteorcloudy/bazel,werkt/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,dslomov/bazel,ulfjack/bazel,twitter-forks/bazel,bazelbuild/bazel,ulfjack/bazel,bazelbuild/bazel,davidzchen/bazel,aehlig/bazel,ulfjack/bazel,twitter-forks/bazel,meteorcloudy/bazel,akira-baruah/bazel,cushon/bazel,werkt/bazel,dslomov/bazel,perezd/bazel,ulfjack/bazel,werkt/bazel,katre/bazel,dslomov/bazel-windows,perezd/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,perezd/bazel,akira-baruah/bazel,cushon/bazel,davidzchen/bazel,aehlig/bazel,katre/bazel,ulfjack/bazel,akira-baruah/bazel,bazelbuild/bazel,bazelbuild/bazel,twitter-forks/bazel,bazelbuild/bazel,ulfjack/bazel,safarmer/bazel,safarmer/bazel,aehlig/bazel,safarmer/bazel,twitter-forks/bazel,aehlig/bazel,twitter-forks/bazel,meteorcloudy/bazel,dslomov/bazel,werkt/bazel,safarmer/bazel,cushon/bazel,meteorcloudy/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,davidzchen/bazel,ButterflyNetwork/bazel,dslomov/bazel,ulfjack/bazel,aehlig/bazel,aehlig/bazel,akira-baruah/bazel,katre/bazel,katre/bazel,dslomov/bazel-windows,dslomov/bazel,dslomov/bazel-windows,safarmer/bazel,cushon/bazel,meteorcloudy/bazel,aehlig/bazel,davidzchen/bazel,bazelbuild/bazel,davidzchen/bazel,katre/bazel,dslomov/bazel,cushon/bazel,davidzchen/bazel,meteorcloudy/bazel,perezd/bazel,perezd/bazel,twitter-forks/bazel,katre/bazel,dslomov/bazel,werkt/bazel,davidzchen/bazel,safarmer/bazel,ButterflyNetwork/bazel,perezd/bazel,cushon/bazel,ButterflyNetwork/bazel