Adding Cocoa generator to Thrift

Summary: Thanks to Andrew McGeachie for doing this

Reviewed By: dreiss

Test Plan: No merge/build issues. Will solicit McGeachie for additions to test/cocoa in the future


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665254 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/compiler/cpp/src/thriftl.ll b/compiler/cpp/src/thriftl.ll
index fbad955..baaef5c 100644
--- a/compiler/cpp/src/thriftl.ll
+++ b/compiler/cpp/src/thriftl.ll
@@ -71,6 +71,7 @@
 "cpp_include"    { return tok_cpp_include;    }
 "cpp_type"       { return tok_cpp_type;       }
 "java_package"   { return tok_java_package;   }
+"cocoa_prefix"   { return tok_cocoa_prefix;   }
 "php_namespace"  { return tok_php_namespace;  }
 "py_module"      { return tok_py_module;      }
 "perl_package"   { return tok_perl_package;   }