Changes to compile with gcc 4.6

Change-Id: I55908b3b98b49373ce948fd1f12e0a5cd56ae4f7
diff --git a/src/jni_internal.cc b/src/jni_internal.cc
index e6c7410..597c58b 100644
--- a/src/jni_internal.cc
+++ b/src/jni_internal.cc
@@ -2356,6 +2356,8 @@
 
       return JNIInvalidRefType;
     }
+    LOG(FATAL) << "IndirectRefKind[" << kind << "]";
+    return JNIInvalidRefType;
   }
 };
 
@@ -2974,5 +2976,8 @@
   case JNIWeakGlobalRefType:
     os << "JNIWeakGlobalRefType";
     return os;
+  default:
+    os << "jobjectRefType[" << static_cast<int>(rhs) << "]";
+    return os;
   }
 }