learning-gem5: Fix missing misc.hh in hello_object.cc

misc.hh has been renamed in
commit 1088f0c4ac3999fc3c363cc51daef4cfb360a2bd

Change-Id: Ic4f8c6423e6a5466f8d924e793a24f62bb4eca9c
Reviewed-on: https://gem5-review.googlesource.com/6361
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
diff --git a/src/learning_gem5/part2/hello_object.cc b/src/learning_gem5/part2/hello_object.cc
index b52a4ce..edf978a 100644
--- a/src/learning_gem5/part2/hello_object.cc
+++ b/src/learning_gem5/part2/hello_object.cc
@@ -30,7 +30,7 @@
 
 #include "learning_gem5/part2/hello_object.hh"
 
-#include "base/misc.hh"
+#include "base/logging.hh"
 #include "debug/HelloExample.hh"
 
 HelloObject::HelloObject(HelloObjectParams *params) :