pch: add iOS 8.2 check

Sources/VLC for iOS-Prefix.pch

@@ -33,6 +33,8 @@
 
 #define SYSTEM_RUNS_IOS8_OR_LATER SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")
 
+#define SYSTEM_RUNS_IOS82_OR_LATER SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.2")
+
 #ifndef NDEBUG
 #define APLog(format, ...) NSLog(format, ## __VA_ARGS__)
 #else