ANDROID_EXTRA_PLUGINS document needs update

ANDROID_EXTRA_PLUGINS QMake variable document indicates giving path ANDROID_EXTRA_PLUGINS += $$top_builddir/plugins should work good if custom qml plugins are kept in custom location but actually this does not work until path to $$top_builddir/plugins/myplugin is supplied.

for example 

ANDROID_EXTRA_PLUGINS += \
$$USERHOMEPATH/.../android/plugins/

Does not work but 

ANDROID_EXTRA_PLUGINS += \

$$USERHOMEPATH/.../android/plugins/position \

Works