Fix the broken makefile.
diff --git a/Android.mk b/Android.mk
index 55bb101..5d16cde 100644
--- a/Android.mk
+++ b/Android.mk
@@ -151,7 +151,7 @@
tts/java/android/tts/ITtsCallback.aidl \
tts/java/android/tts/ITts.aidl \
wifi/java/android/net/wifi/IWifiManager.aidl \
- telephony/java/com/android/internal/telephony/IExtendedNetworkService.aidl
+ telephony/java/com/android/internal/telephony/IExtendedNetworkService.aidl \
vpn/java/android/net/vpn/IVpnService.aidl \
# FRAMEWORKS_BASE_JAVA_SRC_DIRS comes from build/core/pathmap.mk