Double tap gesture sensor test fails on Mac after merging the api_changes branch

Autotest
`tst_qsensorgesturepluginstest.app/Contents/MacOS/tst_qsensorgesturepluginstest'
failed for macx-clang developer-build OSX 10.7

Testing Tst_qsensorgesturePluginsTest
FAIL! : Tst_qsensorgesturePluginsTest::tst_sensor_plugins_qtsensors(QtSensors.doubletap) 'recognizer->isActive() == false' returned FALSE. ()
Loc: [tst_qsensorgesturepluginstest.cpp(146)]
Totals: 12 passed, 1 failed, 0 skipped
QtQA::App::TestRunner: test failed, running again to see if it is flaky...
Testing Tst_qsensorgesturePluginsTest
FAIL! : Tst_qsensorgesturePluginsTest::tst_sensor_plugins_qtsensors(QtSensors.doubletap) 'recognizer->isActive() == false' returned FALSE. ()
Loc: [tst_qsensorgesturepluginstest.cpp(146)]
Totals: 12 passed, 1 failed, 0 skipped
QtQA::App::TestRunner: test failure could be reproduced twice consecutively

make[3]: *** [check] Error 1
make[2]: *** [sub-qsensorgestureplugins-check] Error 2
make[1]: *** [sub-auto-check] Error 2
make: *** [module-qtsensors-tests-check] Error 2