iOS: Handle old exclusive build CONFIG names for simulator and device

Qt Creator uses e.g. CONFIG+=iphoneos to make the default build target
be device. Now that the exclusive build is named simulator_and_device
to support e.g. tvOS, we need to handle the old CONFIG names for
backwards compatibility.

Task-number: QTBUG-52970
Change-Id: I0f864bebf11e657eb4225a182753037205f450b8
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

mkspecs/macx-ios-clang/features/resolve_config.prf

@@ -8,6 +8,12 @@ xcodebuild {
 
 load(resolve_config)
 
+# Legacy exclusive build configurations for backwards compatibility
+CONFIG($${device.CONFIG}, $${device.CONFIG}|$${simulator.CONFIG}): \
+    CONFIG += device
+else: CONFIG($${simulator.CONFIG}, $${device.CONFIG}|$${simulator.CONFIG}): \
+    CONFIG += simulator
+
 CONFIG(simulator, simulator|device): \
     CONFIG -= device $${device.CONFIG}
 else: \