Improved documentation in update_java_tools.sh
Improved documentation in update_java_tools.sh

Signed-off-by: iirina <536ddaae587686b7a8e83ab79b764393df0dd411@google.com>

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