Qt59 release testing

Please add your name when starting to test certain package so others are aware whom to ask or share findings.

Put OK (tester_name), if the package seems to be OK, or NOK (tester_name), if not. Remember to use bugreports.qt.io for bug reporting! You can also add bug ID in addition to name/OK/NOK.

Due to build process reasons installers are from different builds with different build number for Linux, Mac and Windows platforms. If build content for those platform is same then build identifiers are on same column.

Platform	Version #
	Beta2 Linux:#201704170945 MacOS:#201704171000 Windows:#201704171046
Linux x64
Android on Linux x64	NOK(Paul) QTBUG-60318
macOS
Android on macOS
iOS	OK (Tor Arne)
Android on Windows
MinGW
MSVC 2013 x64
MSVC 2015 x86
MSVC 2015 x64
MSVC 2017 x86
MSVC 2017 x64
UWP on MSVC2015
UWP on MSVC2017

Fresh, completely new online installation always provides latest available Beta \ RC release version.

When updating existing installation both Installed version and New version information is available via MaintenanceTool (behind "Update components" selection, see details from How to get snapshot via online installer).

Build id tracked on release testing should equal to "Qt 5.9" Component Name version info (other submodules may have slightly different build id due to build process).