/etc/profile.d/qt_networkmanager_bearer.sh is in ubuntu-touch-session 0.108+16.04.20160407-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # Allow using the proper network manager bearer
export QT_EXCLUDE_GENERIC_BEARER=1
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