Beautifier: create temporary file in input file dir

It fixes finding .clang-format file for "clang-format -style=file"

Task-number: QTCREATORBUG-12057
Change-Id: Idd02de1535eef30e1a1eaf146ef0f9ac9d54c5fa
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/beautifier/beautifierplugin.cpp

@@ -123,7 +123,8 @@ QString BeautifierPlugin::format(const QString &text, QStringList command, const
 
     // Save text to temporary file
     QFileInfo fi(fileName);
-    Utils::TempFileSaver sourceFile(QLatin1String("qtc_beautifier_XXXXXXXX.") + fi.suffix());
+    Utils::TempFileSaver sourceFile(fi.absolutePath() + QLatin1String("/qtc_beautifier_XXXXXXXX.")
+                                    + fi.suffix());
     sourceFile.setAutoRemove(true);
     sourceFile.write(text.toUtf8());
     if (!sourceFile.finalize()) {