Disable threaded GL for nouveau drivers.

Task-number: QTCREATORBUG-10875
Change-Id: I25f3abc6ef15bba78fa9ec27de2c1e5e0bcc7fae
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Android: make the default font size bigger

The default font size turned out to be slightly too small for
comfort on touch devices. This tweaks the size from a 12-point equivalent
to a 14-point equivalent. (Point sizes aren't real point sizes because of
compatibility with iOS.)

Change-Id: I6d970fdd5bba8199cabdf1aaaaac10d19c53c654
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Jens Bache-Wiig <jens.bache-wiig@digia.com>