AUv3: Include framework headers slightly later to fix build error when targeting iOS 13.0

modules/juce_audio_plugin_client/AU/juce_AUv3_Wrapper.mm

@@ -29,10 +29,6 @@
 
 #if JucePlugin_Build_AUv3
 
-#import <CoreAudioKit/CoreAudioKit.h>
-#import <AudioToolbox/AudioToolbox.h>
-#import <AVFoundation/AVFoundation.h>
-
 #if JUCE_MAC
  #if (! defined MAC_OS_X_VERSION_MIN_REQUIRED) || (! defined MAC_OS_X_VERSION_10_11) || (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_11)
   #error AUv3 needs Deployment Target OS X 10.11 or higher to compile
@@ -61,8 +57,12 @@
 
 #include "../utility/juce_IncludeSystemHeaders.h"
 #include "../utility/juce_IncludeModuleHeaders.h"
-#include "../../juce_graphics/native/juce_mac_CoreGraphicsHelpers.h"
 
+#import <CoreAudioKit/CoreAudioKit.h>
+#import <AudioToolbox/AudioToolbox.h>
+#import <AVFoundation/AVFoundation.h>
+
+#include "../../juce_graphics/native/juce_mac_CoreGraphicsHelpers.h"
 #include "../../juce_audio_basics/native/juce_mac_CoreAudioLayouts.h"
 #include "../../juce_audio_processors/format_types/juce_LegacyAudioParameter.cpp"
 #include "../../juce_audio_processors/format_types/juce_AU_Shared.h"