delete px4_includes.h header and update boards/ to use syslog

src/modules/muorb/krait/px4muorb_KraitRpcWrapper.cpp

@@ -40,6 +40,7 @@
 #include "px4_log.h"
 #include <shmem.h>
 #include <drivers/drv_hrt.h>
+#include <string.h>
 
 using namespace px4muorb;
 

src/modules/muorb/krait/uORBKraitFastRpcChannel.cpp

@@ -37,6 +37,7 @@
 #include <drivers/drv_hrt.h>
 #include <cstdio>
 #include <pthread.h>
+#include <string.h>
 
 #define LOG_TAG "uORBKraitFastRpcChannel.cpp"