Make a few log messages come out in "log enable lldb step" as well as "log enable lldb expression".

git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@123784 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Expression/ClangFunction.cpp b/source/Expression/ClangFunction.cpp
index d2435a7..e7b6f77 100644
--- a/source/Expression/ClangFunction.cpp
+++ b/source/Expression/ClangFunction.cpp
@@ -208,7 +208,7 @@
     m_wrapper_function_text.append (args_list_buffer);
     m_wrapper_function_text.append (");\n}\n");
 
-    lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
+    lldb::LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
     if (log)
         log->Printf ("Expression: \n\n%s\n\n", m_wrapper_function_text.c_str());