Bazel: Bump java_tools version to 6.0

This upgrade of java_tools is needed to remove Java 7 compatibility mode
for java_proto_library rules. This was done in this CL: [1], that is
included in java_tools release 6.0.

[1] https://github.com/bazelbuild/bazel/pull/9450

Bug: Issue 11102
Change-Id: Ic0043544d238ee5cc2dcaf67ff1db9d8a5397bfa
diff --git a/WORKSPACE b/WORKSPACE
index 2530dd4..58cad33 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -72,6 +72,37 @@
 
 ANTLR_VERS = "3.5.2"
 
+# TODO(davido): Remove this upgrade, when new Bazel version is released
+# that includes java_tools v6.0. FTR, we are doing this to get this change
+# https://github.com/bazelbuild/bazel/pull/9450, to fix this annoying bug:
+# https://github.com/bazelbuild/bazel/issues/8772.
+http_archive(
+    name = "remote_java_tools_linux",
+    sha256 = "37acb8380b1dd6c31fd27a19bf3da821c9b02ee93c6163fce36f070a806516b5",
+    urls = [
+        "https://mirror.bazel.build/bazel_java_tools/releases/javac11/v6.0/java_tools_javac11_linux-v6.0.zip",
+        "https://github.com/bazelbuild/java_tools/releases/download/javac11-v6.0/java_tools_javac11_linux-v6.0.zip",
+    ],
+)
+
+http_archive(
+    name = "remote_java_tools_windows",
+    sha256 = "384e138ca58842ea563fb7efbe0cb9c5c381bd4de1f6a31f0256823325f81ccc",
+    urls = [
+        "https://mirror.bazel.build/bazel_java_tools/releases/javac11/v6.0/java_tools_javac11_windows-v6.0.zip",
+        "https://github.com/bazelbuild/java_tools/releases/download/javac11-v6.0/java_tools_javac11_windows-v6.0.zip",
+    ],
+)
+
+http_archive(
+    name = "remote_java_tools_darwin",
+    sha256 = "5a9f320c33424262e505151dd5c6903e36678a0f0bbdaae67bcf07f41d8c7cf3",
+    urls = [
+        "https://mirror.bazel.build/bazel_java_tools/releases/javac11/v6.0/java_tools_javac11_darwin-v6.0.zip",
+        "https://github.com/bazelbuild/java_tools/releases/download/javac11-v6.0/java_tools_javac11_darwin-v6.0.zip",
+    ],
+)
+
 maven_jar(
     name = "java-runtime",
     artifact = "org.antlr:antlr-runtime:" + ANTLR_VERS,