[Logging] Replace Log::Printf with LLDB_LOG macro (NFC)

This patch replaces explicit calls to log::Printf with the new LLDB_LOGF
macro. The macro is similar to LLDB_LOG but supports printf-style format
strings, instead of formatv-style format strings.

So instead of writing:

  if (log)
    log->Printf("%s\n", str);

You'd write:

  LLDB_LOG(log, "%s\n", str);

This change was done mechanically with the command below. I replaced the
spurious if-checks with vim, since I know how to do multi-line
replacements with it.

  find . -type f -name '*.cpp' -exec \
  sed -i '' -E 's/log->Printf\(/LLDB_LOGF\(log, /g' "{}" +

Differential revision: https://reviews.llvm.org/D65128

llvm-svn: 366936
diff --git a/lldb/source/Plugins/SystemRuntime/MacOSX/SystemRuntimeMacOSX.cpp b/lldb/source/Plugins/SystemRuntime/MacOSX/SystemRuntimeMacOSX.cpp
index dfcc6ac..4e384bd 100644
--- a/lldb/source/Plugins/SystemRuntime/MacOSX/SystemRuntimeMacOSX.cpp
+++ b/lldb/source/Plugins/SystemRuntime/MacOSX/SystemRuntimeMacOSX.cpp
@@ -927,13 +927,13 @@
       offset_t start_of_next_item = start_of_this_item + offset_to_next;
       offset = start_of_next_item;
 
-      if (log)
-        log->Printf("SystemRuntimeMacOSX::PopulateQueuesUsingLibBTR added "
-                    "queue with dispatch_queue_t 0x%" PRIx64
-                    ", serial number 0x%" PRIx64
-                    ", running items %d, pending items %d, name '%s'",
-                    queue, serialnum, running_work_items_count,
-                    pending_work_items_count, queue_label);
+      LLDB_LOGF(log,
+                "SystemRuntimeMacOSX::PopulateQueuesUsingLibBTR added "
+                "queue with dispatch_queue_t 0x%" PRIx64
+                ", serial number 0x%" PRIx64
+                ", running items %d, pending items %d, name '%s'",
+                queue, serialnum, running_work_items_count,
+                pending_work_items_count, queue_label);
 
       QueueSP queue_sp(
           new Queue(m_process->shared_from_this(), serialnum, queue_label));