Fix the issue that CoreGraphics coordinate system on watchOS

Author: dreampiggy

SDWebImagePDFCoder/Classes/SDImagePDFCoder.m

@@ -203,7 +203,7 @@ - (UIImage *)createBitmapPDFWithData:(nonnull NSData *)data pageNumber:(NSUInteg
     SDGraphicsBeginImageContextWithOptions(targetRect.size, NO, 0);
     CGContextRef context = SDGraphicsGetCurrentContext();
 
-#if SD_UIKIT
+#if SD_UIKIT || SD_WATCH
     // Core Graphics coordinate system use the bottom-left, UIkit use the flipped one
     CGContextTranslateCTM(context, 0, targetRect.size.height);
     CGContextScaleCTM(context, 1, -1);