Remove bzero use and replace with memset (patch from Kirk Beitz).

llvm-svn: 124897
diff --git a/lldb/source/Core/Log.cpp b/lldb/source/Core/Log.cpp
index ceead58..49bd653 100644
--- a/lldb/source/Core/Log.cpp
+++ b/lldb/source/Core/Log.cpp
@@ -356,7 +356,7 @@
         log_callbacks = pos->second;
         return true;
     }
-    ::bzero (&log_callbacks, sizeof(log_callbacks));
+    ::memset (&log_callbacks, 0, sizeof(log_callbacks));
     return false;
 }