skylark_repository_test: add checksums for http downloads
skylark_repository_test: add checksums for http downloads

...so that our tests are compatible with the #8607 flag flip.

Change-Id: Ie2164b97c6be60cb58520352f8f7bcd7eb694fa8
PiperOrigin-RevId: 259507136

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