Removing issues in the models that cause Infer to flag warnings

Summary: public The properties in those models needed to be made nonatomic.

Reviewed By: akotulski

Differential Revision: D2773650

fb-gh-sync-id: 903e7df

infer/models/objc/src/NSData.m

@@ -14,7 +14,7 @@ NSData* __objc_alloc(NSData*);
 
 @interface NSData : NSObject
 
-@property (readonly) const void *bytes;
+@property (nonatomic, readonly) const void *bytes;
 
 + (instancetype)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length;
 + (instancetype)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b;

infer/models/objc/src/NSFileHandle.m

@@ -20,7 +20,7 @@
 
 - (instancetype)initWithFileDescriptor:(int)fd;
 
-@property (readonly) int fileDescriptor;
+@property (nonatomic, readonly) int fileDescriptor;
 
 @end