Increase timeout of tst_QProcess::softExitInSlots even more

Commit eab7efd1 increased the timeout for this test, but apparently 10
seconds are still not enough. Set the timeout to a minute.

Task-number: QTBUG-59075
Change-Id: Iebab8e5c73c4858ca90063a82aedfbb2546a62cc
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

tests/auto/corelib/io/qprocess/tst_qprocess.cpp

@@ -1026,7 +1026,7 @@ void tst_QProcess::softExitInSlots()
     SoftExitProcess proc(signalToConnect);
     proc.writeAfterStart("OLEBOLE", 8); // include the \0
     proc.start(appName);
-    QTRY_VERIFY_WITH_TIMEOUT(proc.waitedForFinished, 10000);
+    QTRY_VERIFY_WITH_TIMEOUT(proc.waitedForFinished, 60000);
     QCOMPARE(proc.state(), QProcess::NotRunning);
 }