Pin the qtbase SHA1
Pin the qtbase SHA1

Needed in order to get through
https://codereview.qt-project.org/#change,29193 in qtbase.
https://codereview.qt-project.org/#change,29194 adapts qtdeclarative
to the change.

Change-Id: Ibc5adbaf40a94e23cffb29177fff137e79efa7da
Reviewed-by: Lars Knoll <a812617a4072dcbeb80684eca0f369f0083af109@nokia.com>

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