Ministro on Android 5.x status update

[BogDan Vatra]

Hello folks,

I have good news on this matter. It seems all the problems where
caused by Android linker & implementation of System.load(path) which
calls JNI_OnLoad more than once, check
https://code.google.com/p/android/issues/detail?id=215069 for more
info on this matter.

I already created workarounds
https://codereview.qt-project.org/#/c/164232/ which fixes the problem
and allows the apps to use Ministro again on Android 5.x+. We still
need to wait for 5.6.2 and 5.7.1 release to have the fix.

Big thanks to Roman Lebedev, who lead me to find the problem!

Cheers,
BogDan.