tutorial examples for writing new Clang plugin actions

http://wiki.documentfoundation.org/Clang_plugins

Change-Id: Ieb4fc186490e81ab961c094ca0a7fcdabc0f348f

compilerplugins/clang/store/tutorial/tutorial1_example.cxx

@@ -0,0 +1,18 @@
+// This is just an example file to see what AST looks like for return statements.
+// To the the AST, run :
+// clang++ -fsyntax-only -Xclang -ast-dump tutorial1_example.cxx
+
+void f()
+    {
+    return;
+    }
+
+bool g()
+    {
+    return false;
+    }
+
+bool h()
+    {
+    return 3 > 2;
+    }