Disable bazel_bootstrap_distfile_test.

Fails on JDK7.

--
MOS_MIGRATED_REVID=140116652
diff --git a/src/test/shell/bazel/BUILD b/src/test/shell/bazel/BUILD
index e83ada3..851dec5 100644
--- a/src/test/shell/bazel/BUILD
+++ b/src/test/shell/bazel/BUILD
@@ -414,6 +414,7 @@
         ":test-deps",
         "//:bazel-distfile",
     ],
+    tags = ["manual"],
 )
 
 test_suite(