Moving SystemUtilsApple.mm and SystemUtilsApple.h from CrySystem to AzFramework to fix linker error when building iOS non-monolithically (#631)

Code/CryEngine/CrySystem/Platform/Mac/platform_mac_files.cmake

@@ -8,8 +8,3 @@
 # remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #
-
-set(FILES
-    ../../SystemUtilsApple.h
-    ../../SystemUtilsApple.mm
-)

Code/CryEngine/CrySystem/Platform/iOS/platform_ios_files.cmake

@@ -13,8 +13,6 @@ set(FILES
     ../../MobileDetectSpec_Ios.cpp
     ../../MobileDetectSpec.cpp
     ../../MobileDetectSpec.h
-    ../../SystemUtilsApple.h
-    ../../SystemUtilsApple.mm
 )