Install the jar file

Change-Id: Ife46aba11920c5109d974f9e388e49320bf1a95a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

src/plugins/android/jar/jar.pro

@@ -9,3 +9,7 @@ JAVACLASSPATH += $$PWD/src
 JAVASOURCES += $$PWD/src/org/qtproject/qt5/android/multimedia/QtAndroidMediaPlayer.java \
                $$PWD/src/org/qtproject/qt5/android/multimedia/QtSurfaceTexture.java \
                $$PWD/src/org/qtproject/qt5/android/multimedia/QtSurfaceTextureHolder.java
+
+# install
+target.path = $$[QT_INSTALL_PREFIX]/jar
+INSTALLS += target