switched from fitpc/atom to prime/linux

Also removed a few old things that had nothing reasonable to be changed
to.
diff --git a/aos/common/network/SendSocket.h b/aos/common/network/SendSocket.h
index 9323da8..06529d0 100644
--- a/aos/common/network/SendSocket.h
+++ b/aos/common/network/SendSocket.h
@@ -3,7 +3,7 @@
 
 #include "Socket.h"
 
-#include "aos/atom_code/configuration.h"
+#include "aos/linux_code/configuration.h"
 #include "aos/common/network_port.h"
 #include "aos/common/util.h"