Skip animations tests for MinGW.

These tests typically fail in the CI.
Task-number: QTBUG-36290

Change-Id: I36a19c2914932d4f70c1df24e1c5ad4a3d0e2795
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

tests/auto/qml/animation/qparallelanimationgroupjob/tst_qparallelanimationgroupjob.cpp

@@ -868,6 +868,9 @@ void tst_QParallelAnimationGroupJob::addAndRemoveDuration()
 
 void tst_QParallelAnimationGroupJob::pauseResume()
 {
+#ifdef Q_CC_MINGW
+    QSKIP("QTBUG-36290 - MinGW Animation tests are flaky.");
+#endif
     QParallelAnimationGroupJob group;
     TestAnimation *anim = new TestAnimation(250);      // 0, duration = 250;
     group.appendAnimation(anim);

tests/auto/quick/qquickanimations/tst_qquickanimations.cpp

@@ -470,6 +470,9 @@ void tst_qquickanimations::pathInterpolator()
 
 void tst_qquickanimations::pathInterpolatorBackwardJump()
 {
+#ifdef Q_CC_MINGW
+    QSKIP("QTBUG-36290 - MinGW Animation tests are flaky.");
+#endif
     {
         QQmlEngine engine;
         QQmlComponent c(&engine, testFileUrl("pathInterpolatorBack.qml"));

tests/auto/quick/qquicksmoothedanimation/tst_qquicksmoothedanimation.cpp

@@ -192,6 +192,9 @@ void tst_qquicksmoothedanimation::valueSource()
 
 void tst_qquicksmoothedanimation::behavior()
 {
+#ifdef Q_CC_MINGW
+    QSKIP("QTBUG-36290 - MinGW Animation tests are flaky.");
+#endif
     QQmlEngine engine;
 
     QQmlComponent c(&engine, testFileUrl("smoothedanimationBehavior.qml"));