Add 'generated' attribute to auto-generated files.

Author: dmsnell

.gitattributes

@@ -1,7 +1,7 @@
-/src/wp-includes/assets/script-loader-packages.php binary
-/src/wp-includes/assets/script-modules-packages.php binary
-/src/wp-includes/assets/script-loader-packages.min.php binary
-/src/wp-includes/assets/script-modules-packages.min.php binary
-/src/wp-includes/icons/** binary
-/src/wp-includes/blocks/*/view.asset.php binary
-/src/wp-includes/blocks/*/view.min.asset.php binary
+/src/wp-includes/assets/script-loader-packages.php -text binary diff=generated
+/src/wp-includes/assets/script-modules-packages.php -text binary diff=generated
+/src/wp-includes/assets/script-loader-packages.min.php -text binary diff=generated
+/src/wp-includes/assets/script-modules-packages.min.php -text binary diff=generated
+/src/wp-includes/icons/** -text binary diff=generated
+/src/wp-includes/blocks/*/view.asset.php -text binary diff=generated
+/src/wp-includes/blocks/*/view.min.asset.php -text binary diff=generated