Add unit test for exercising AbstractMethodErrorStub code.

Change-Id: I6021459a75681c92a40931f591852e974f1ca1a6
diff --git a/src/compiler.cc b/src/compiler.cc
index fb510bb..fa9867d 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -17,6 +17,7 @@
 typedef void (*ThrowAme)(Method*, Thread*);
 
 void ThrowAbstractMethodError(Method* method, Thread* thread) {
+  LOG(FATAL) << "Unimplemented Exception Handling. Remove this when ThrowException works.";
   thread->ThrowNewException("Ljava/lang/AbstractMethodError",
                             "abstract method \"%s\"",
                             PrettyMethod(method).c_str());