Update OpenConnect (app.openconnect) to 0.5 (509)

metadata/app.openconnect.txt

@@ -46,8 +46,15 @@ Build:0.2,2
         make -C external/openconnect/android sources
     build=make -C external NDK=$$NDK$$
 
+Build:0.5,509
+    commit=v0.5
+    submodules=yes
+    prebuild=rm -rf assets/raw/{armeabi,x86,mips} libs/*.jar libs/*/*.so && \
+        make -C external/openconnect/android sources
+    build=make -C external NDK=$$NDK$$
+
 Auto Update Mode:None
 Update Check Mode:None
-Current Version:0.2
-Current Version Code:2
+Current Version:0.5
+Current Version Code:509