Nest some more namespaces

Did someone previously suggest that all namespace had been
nested?  Silly.

Signed-off-by: Stephan Pleines <pleines.stephan@gmail.com>
Change-Id: I22278c1caaeba8b47dc46fb2ed3078c20a11e190
diff --git a/aos/seasocks/seasocks_logger.h b/aos/seasocks/seasocks_logger.h
index 64f13fa..f60ab48 100644
--- a/aos/seasocks/seasocks_logger.h
+++ b/aos/seasocks/seasocks_logger.h
@@ -3,8 +3,7 @@
 
 #include "seasocks/PrintfLogger.h"
 
-namespace aos {
-namespace seasocks {
+namespace aos::seasocks {
 
 class SeasocksLogger : public ::seasocks::PrintfLogger {
  public:
@@ -13,7 +12,6 @@
   void log(::seasocks::Logger::Level level, const char *message) override;
 };
 
-}  // namespace seasocks
-}  // namespace aos
+}  // namespace aos::seasocks
 
 #endif  // AOS_SEASOCKS_SEASOCKS_LOGGER_H_