try to fix the sphinx build some more

llvm-svn: 358156
diff --git a/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl02.rst b/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl02.rst
index fb9ee72..3a26800 100644
--- a/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl02.rst
+++ b/llvm/docs/tutorial/MyFirstLanguageFrontend/LangImpl02.rst
@@ -1,3 +1,5 @@
+:orphan:
+
 ===========================================
 Kaleidoscope: Implementing a Parser and AST
 ===========================================