Disabled some more warnings in 3rd party AU and AAX code

modules/juce_audio_plugin_client/AAX/juce_AAX_Wrapper.cpp

@@ -37,6 +37,7 @@
  #pragma clang diagnostic push
  #pragma clang diagnostic ignored "-Wnon-virtual-dtor"
  #pragma clang diagnostic ignored "-Wsign-conversion"
+ #pragma clang diagnostic ignored "-Wextra-semi"
 #endif
 
 #ifdef _MSC_VER

modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm

@@ -42,6 +42,7 @@
  #pragma clang diagnostic ignored "-Wsign-conversion"
  #pragma clang diagnostic ignored "-Wconversion"
  #pragma clang diagnostic ignored "-Woverloaded-virtual"
+ #pragma clang diagnostic ignored "-Wextra-semi"
 #endif
 
 #include "../utility/juce_IncludeSystemHeaders.h"

modules/juce_audio_plugin_client/juce_audio_plugin_client_AU_2.mm

@@ -32,6 +32,7 @@
  #pragma clang diagnostic ignored "-Wconversion"
  #pragma clang diagnostic ignored "-Wunused-parameter"
  #pragma clang diagnostic ignored "-Wunused"
+ #pragma clang diagnostic ignored "-Wextra-semi"
 #endif
 
 #ifdef _MSC_VER