helper/log: Cleanup #includes.

Change-Id: Ie343524dd843d518086a86866391b5a34556082b
Signed-off-by: Marc Schink <openocd-dev@marcschink.de>
Reviewed-on: http://openocd.zylin.com/2996
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

src/helper/log.c

@@ -28,9 +28,9 @@
 #include "config.h"
 #endif
 
+#include "log.h"
+#include "command.h"
 #include "time_support.h"
-/* @todo the inclusion of server.h here is a layering violation */
-#include <server/server.h>
 
 #include <stdarg.h>