Fix to 1.0.1 - add missing .bzl files (#201)

BUILD

diff --git a/BUILD b/BUILD
index 385f0fe..8ae601d 100644
--- a/BUILD
+++ b/BUILD
@@ -61,5 +61,7 @@
         "CONTRIBUTORS",
         "//lib:distribution",
         "//rules:distribution",
+        "//rules/private:distribution",
+        "//toolchains/unittest:distribution",
     ] + glob(["*.bzl"]),
 )