Fixing C++ and ruby code generators for the opensource build.
	Change on 2014/12/11 by nnoble <nnoble@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81921764
diff --git a/build.json b/build.json
index 550f3af..0e3152f 100644
--- a/build.json
+++ b/build.json
@@ -365,6 +365,7 @@
     {
       "name": "cpp_plugin",
       "build": "protoc",
+      "c++": true,
       "src": [
         "src/compiler/cpp_plugin.cpp",
         "src/compiler/cpp_generator.cpp"
@@ -378,6 +379,7 @@
     {
       "name": "ruby_plugin",
       "build": "protoc",
+      "c++": true,
       "src": [
         "src/compiler/ruby_plugin.cpp",
         "src/compiler/ruby_generator.cpp"