Move Log from Core -> Utility.

All references to Host and Core have been removed, so this
class can now safely be lowered into Utility.

Differential Revision: https://reviews.llvm.org/D30559

llvm-svn: 296909
diff --git a/lldb/source/API/SBError.cpp b/lldb/source/API/SBError.cpp
index 8b03f56..a692a96 100644
--- a/lldb/source/API/SBError.cpp
+++ b/lldb/source/API/SBError.cpp
@@ -9,8 +9,8 @@
 
 #include "lldb/API/SBError.h"
 #include "lldb/API/SBStream.h"
-#include "lldb/Core/Log.h"
 #include "lldb/Utility/Error.h"
+#include "lldb/Utility/Log.h"
 
 #include <stdarg.h>