Set context to defined value OnRun

The context for the eventloop is currently not set to
anything when entering an OnRun callback. The context
are now set to some known value for simulated and real
time when entering OnRun callback.

While we are here, I noticed that the *remote* uuid was set to the local
UUID in timers.  That makes no sense, so stop doing that.

Change-Id: I2c227a7e9742b092c9079549aad341154460ff11
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/aos/ipc_lib/lockless_queue_test.cc b/aos/ipc_lib/lockless_queue_test.cc
index 91f995b..57867e4 100644
--- a/aos/ipc_lib/lockless_queue_test.cc
+++ b/aos/ipc_lib/lockless_queue_test.cc
@@ -251,7 +251,7 @@
     monotonic_clock::time_point monotonic_remote_time;
     realtime_clock::time_point realtime_remote_time;
     uint32_t remote_queue_index;
-    UUID remote_boot_uuid;
+    UUID source_boot_uuid;
     char read_data[1024];
     size_t length;
 
@@ -264,7 +264,7 @@
     LocklessQueueReader::Result read_result = reader.Read(
         index.index(), &monotonic_sent_time, &realtime_sent_time,
         &monotonic_remote_time, &realtime_remote_time, &remote_queue_index,
-        &remote_boot_uuid, &length, &(read_data[0]));
+        &source_boot_uuid, &length, &(read_data[0]));
 
     // This should either return GOOD, or TOO_OLD if it is before the start of
     // the queue.