Upgrade to bazel 0.19.0-rc5

Sandbox java as well!

Change-Id: If46914a08ea05b3ae915727b6e89ec45c703645b
diff --git a/tools/bazel b/tools/bazel
index fe2a296..6f5230c 100755
--- a/tools/bazel
+++ b/tools/bazel
@@ -24,8 +24,7 @@
   exec "${BAZEL_OVERRIDE}" "$@"
 fi
 
-readonly VERSION="201807071512+aa7e972"
-#bazel_201807071512+aa7e972.xz
+readonly VERSION="0.19.0rc4-201810201638+ac88041"
 
 readonly DOWNLOAD_DIR="$(dirname "${BASH_SOURCE[0]}")/../bazel-downloads"
 # Directory to unpack bazel into.  This must change whenever bazel changes.