add documentation skeleton


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@40471 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/index.html b/docs/index.html
new file mode 100644
index 0000000..d741b68
--- /dev/null
+++ b/docs/index.html
@@ -0,0 +1,4 @@
+<title>'clang' C frontend documentation</title>
+
+None yet, sorry :(
+