Git: Pass only files after -- on Blame

It works, but is likely to break at some point.

Change-Id: I97952a7cb6cd3569adc694db7537fab807bda0ea
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/git/gitclient.cpp

@@ -1354,9 +1354,10 @@ VcsBaseEditorWidget *GitClient::annotate(
 
     editor->setWorkingDirectory(workingDir);
     QStringList arguments = {"blame", "--root"};
-    arguments << argWidget->arguments() << "--" << file;
+    arguments << argWidget->arguments();
     if (!revision.isEmpty())
         arguments << revision;
+    arguments << "--" << file;
     editor->setDefaultLineNumber(lineNumber);
     vcsExec(workingDir, arguments, editor);
     return editor;