[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

lldb/source/Target/ModuleCache.cpp

@@ -94,9 +94,8 @@ void DeleteExistingModule(const FileSpec &root_dir_spec,
   Status error;
   ModuleLock lock(root_dir_spec, module_uuid, error);
   if (error.Fail()) {
-    if (log)
-      log->Printf("Failed to lock module %s: %s",
-                  module_uuid.GetAsString().c_str(), error.AsCString());
+    LLDB_LOGF(log, "Failed to lock module %s: %s",
+              module_uuid.GetAsString().c_str(), error.AsCString());
   }
 
   namespace fs = llvm::sys::fs;