Make example/Hello compile again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89363 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvmc/example/Hello/Hello.cpp b/tools/llvmc/example/Hello/Hello.cpp
index 9c96bd0..a7179ea 100644
--- a/tools/llvmc/example/Hello/Hello.cpp
+++ b/tools/llvmc/example/Hello/Hello.cpp
@@ -17,6 +17,10 @@
 
 namespace {
 struct MyPlugin : public llvmc::BasePlugin {
+
+  void PreprocessOptions() const
+  {}
+
   void PopulateLanguageMap(llvmc::LanguageMap&) const
   { outs() << "Hello!\n"; }