jni: Upgrade NFD and ndn-cxx to the latest dev releases

- NFD version 0.3.4-16-g441ba21
- ndn-cxx version 0.3.4-9-g80b68e1

Change-Id: Ia2097e2693488965503a32a90266a450246536b3
diff --git a/app/src/main/jni/nfd-android/version.hpp b/app/src/main/jni/nfd-android/version.hpp
index e1ebc6f..f213551 100644
--- a/app/src/main/jni/nfd-android/version.hpp
+++ b/app/src/main/jni/nfd-android/version.hpp
@@ -60,7 +60,7 @@
  *
  * Example, 0.1.0-rc1-1-g5c86570
  */
-#define NFD_VERSION_BUILD_STRING "0.3.4"
+#define NFD_VERSION_BUILD_STRING "0.3.4-16-g441ba21"
 
 /// MAJOR version
 #define NFD_VERSION_MAJOR 0