Add bazel build/workspace into distribution.

Change-Id: I96fbe5c84a04f5d95c5484002404fc975f2abd21
diff --git a/Makefile.am b/Makefile.am
index 202974e..382e840 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -602,6 +602,9 @@
   CONTRIBUTORS.txt                       \
   CHANGES.txt                            \
   update_file_lists.sh                   \
+  BUILD                                  \
+  gmock.BUILD                            \
+  WORKSPACE                              \
   cmake/CMakeLists.txt                   \
   cmake/README.md                        \
   cmake/extract_includes.bat.in          \