Include <sys/socket.h> instead of <linux/socket.h>.

In newer kernels, <linux/socket.h> no longer contains some of the stuff you're
using.

Change-Id: I92c6847d73c20fb49d0db15c1cc15aa07fb5d44d
diff --git a/services/common_time/common_time_server.h b/services/common_time/common_time_server.h
index a0f549f..89bca64 100644
--- a/services/common_time/common_time_server.h
+++ b/services/common_time/common_time_server.h
@@ -19,7 +19,7 @@
 
 #include <arpa/inet.h>
 #include <stdint.h>
-#include <linux/socket.h>
+#include <sys/socket.h>
 
 #include <common_time/ICommonClock.h>
 #include <common_time/local_clock.h>