QmlDesigner.Tests: Fix formating

Change-Id: I466a0e808fc7da8516421ee46c1a09ca1d0a0144
Reviewed-by: Alessandro Portale <alessandro.portale@nokia.com>

tests/auto/qml/qmldesigner/coretests/coretests.pro

 include(../../../qttest.pri)
 
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 QTCREATOR_SOURCE=$$PWD/../../../../..
 QTCREATOR_BUILD=$$OUT_PWD/../../../../..
 # can we check that this is a valid build dir?