MM-19734 Patch RN to remove the placeholder for emojis in a markdown paragraph (#3485)

patches/react-native+0.59.9.patch

@@ -0,0 +1,25 @@
+diff --git a/node_modules/react-native/Libraries/Text/Text/RCTTextShadowView.m b/node_modules/react-native/Libraries/Text/Text/RCTTextShadowView.m
+index d464e6a..6c397c5 100644
+--- a/node_modules/react-native/Libraries/Text/Text/RCTTextShadowView.m
++++ b/node_modules/react-native/Libraries/Text/Text/RCTTextShadowView.m
+@@ -170,6 +170,12 @@ - (void)postprocessAttributedText:(NSMutableAttributedString *)attributedText
+ 
+ - (NSAttributedString *)attributedTextWithMeasuredAttachmentsThatFitSize:(CGSize)size
+ {
++  static UIImage *placeholderImage;
++  static dispatch_once_t onceToken;
++  dispatch_once(&onceToken, ^{
++    placeholderImage = [UIImage new];
++  });
++
+   NSMutableAttributedString *attributedText =
+     [[NSMutableAttributedString alloc] initWithAttributedString:[self attributedTextWithBaseTextAttributes:nil]];
+ 
+@@ -188,6 +194,7 @@ - (NSAttributedString *)attributedTextWithMeasuredAttachmentsThatFitSize:(CGSize
+                                                    maximumSize:size];
+       NSTextAttachment *attachment = [NSTextAttachment new];
+       attachment.bounds = (CGRect){CGPointZero, fittingSize};
++      attachment.image = placeholderImage;
+       [attributedText addAttribute:NSAttachmentAttributeName value:attachment range:range];
+     }
+   ];