update_engine: Fuzzer builders failing to build update_engine

|OmahaRequestAction| takes within it's constructor another arguement for
the session ID. Updates to arguements passed must be made at the
callsite within omaha_request_action_fuzzer.cc.

BUG=chromium:979057
TEST=USE="asan fuzzer" emerge-$BOARD update_engine

Change-Id: I0a8ed7cd9e0ec8ee6b165617d2816d1f1753edd3
diff --git a/omaha_request_action_fuzzer.cc b/omaha_request_action_fuzzer.cc
index 6c2f7ca..6c41b12 100644
--- a/omaha_request_action_fuzzer.cc
+++ b/omaha_request_action_fuzzer.cc
@@ -38,7 +38,8 @@
           nullptr,
           std::make_unique<chromeos_update_engine::MockHttpFetcher>(
               data, size, nullptr),
-          false);
+          false,
+          "" /* session_id */);
   auto collector_action =
       std::make_unique<chromeos_update_engine::ObjectCollectorAction<
           chromeos_update_engine::OmahaResponse>>();