include Package proto into Result proto

recipe_engine/result.proto

Index: recipe_engine/result.proto
diff --git a/recipe_engine/result.proto b/recipe_engine/result.proto
index 050e36e2b947d6531fb3f9172f1b076c52d10294..86daa3fba7aef63336bcc2ae9b2945a42dfc6078 100644
--- a/recipe_engine/result.proto
+++ b/recipe_engine/result.proto
@@ -2,6 +2,8 @@ syntax = "proto3";
 
 package recipe_engine;
 
+import "package.proto";
+
 // The result of a recipe execution.
 message Result {
   oneof oneof_result {
@@ -12,6 +14,9 @@ message Result {
     // The cause of the failure of a recipe.
     Failure failure = 2;
   }
+
+  // Initial recipe repo's package spec (recipes.cfg).
+  Package recipe_package = 3;
 }
 
 message Failure {