testlib/qasciikey: Add keypad navigation keys

Needed to prevent qasciikey.cpp from failing an assertion when
Qt::Key_Select is used in tests.

Change-Id: I56aa517e8f6f332636b3df106d7265677d1b33ee
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

src/testlib/qasciikey.cpp

@@ -498,6 +498,11 @@ char QTest::keyToAscii(Qt::Key key)
     case Qt::Key_LaunchE : return 0; // = 0x10b0,
     case Qt::Key_LaunchF : return 0; // = 0x10b1,
 
+    // Keypad navigation keys
+    case Qt::Key_Select : return 0; // = 0x01010000
+    case Qt::Key_Yes : return 0; // = 0x01010001
+    case Qt::Key_No : return 0; // = 0x01010002
+
     default: QTEST_ASSERT(false); return 0;
     }
 }