Eliminate includes file and include locally as required.

Log.cpp

@@ -1,5 +1,10 @@
 #include "Log.h"
 #include "LogListener.h"
+#include <sstream>
+#include <iostream>
+#include <iomanip>
+#include <sys/syscall.h>
+#include <unistd.h>
 
 namespace coreutils {