Use uname to obtain iOS Device Model for physical devices (#938)

Author: eduardo-camacho

lib/pal/posix/sysinfo_utils_ios.mm

@@ -5,6 +5,7 @@
 
 #include "sysinfo_utils_apple.hpp"
 #import <Foundation/Foundation.h>
+#import <sys/utsname.h>
 #import <UIKit/UIKit.h>
 
 std::string GetDeviceModel()
@@ -14,7 +15,18 @@
         NSString* modelId = NSProcessInfo.processInfo.environment[@"SIMULATOR_MODEL_IDENTIFIER"];
         return std::string([modelId UTF8String]);
 #else
-        std::string deviceModel { [[[UIDevice currentDevice] model] UTF8String] };
+        std::string deviceModel { };
+        struct utsname systemInfo;
+        if (uname(&systemInfo) < 0)
+        {
+		    // Fallback to UIDevice in case of error
+		    deviceModel = [[[UIDevice currentDevice] model] UTF8String];
+        }
+        else
+        {
+		    deviceModel = systemInfo.machine;
+        }
+
         return deviceModel;
 #endif
     }