Fixing a few items with the new Bazel BUILD system:

-) Fixing Bazel 0.4.x breakage
-) Adding helloworld BUILD examples
-) Fixing grpc++ missing files.
-) Adding helloworld example as a test for Bazel basic.
diff --git a/examples/cpp/helloworld/BUILD b/examples/cpp/helloworld/BUILD
new file mode 100644
index 0000000..b9c3f5d
--- /dev/null
+++ b/examples/cpp/helloworld/BUILD
@@ -0,0 +1,42 @@
+# Copyright 2017, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+cc_binary(
+    name = "greeter_client",
+    srcs = ["greeter_client.cc"],
+    deps = ["//examples/protos:helloworld"],
+    defines = ["BAZEL_BUILD"],
+)
+
+cc_binary(
+    name = "greeter_server",
+    srcs = ["greeter_server.cc"],
+    deps = ["//examples/protos:helloworld"],
+    defines = ["BAZEL_BUILD"],
+)
diff --git a/examples/cpp/helloworld/greeter_client.cc b/examples/cpp/helloworld/greeter_client.cc
index 61f3953..8ee33b1 100644
--- a/examples/cpp/helloworld/greeter_client.cc
+++ b/examples/cpp/helloworld/greeter_client.cc
@@ -37,7 +37,11 @@
 
 #include <grpc++/grpc++.h>
 
+#ifdef BAZEL_BUILD
+#include "examples/protos/helloworld.grpc.pb.h"
+#else
 #include "helloworld.grpc.pb.h"
+#endif
 
 using grpc::Channel;
 using grpc::ClientContext;
diff --git a/examples/cpp/helloworld/greeter_server.cc b/examples/cpp/helloworld/greeter_server.cc
index 9eab32c..c8a6d8a 100644
--- a/examples/cpp/helloworld/greeter_server.cc
+++ b/examples/cpp/helloworld/greeter_server.cc
@@ -37,7 +37,11 @@
 
 #include <grpc++/grpc++.h>
 
+#ifdef BAZEL_BUILD
+#include "examples/protos/helloworld.grpc.pb.h"
+#else
 #include "helloworld.grpc.pb.h"
+#endif
 
 using grpc::Server;
 using grpc::ServerBuilder;