QA: Add @test references

Author: thekid

src/main/php/lang/ast/emit/PHP83.class.php

@@ -15,6 +15,7 @@
 /**
  * PHP 8.3 syntax
  *
+ * @test lang.ast.unittest.emit.PHP83Test
  * @see  https://wiki.php.net/rfc#php_83
  */
 class PHP83 extends PHP {

src/main/php/lang/ast/emit/PHP84.class.php

@@ -15,6 +15,7 @@
 /**
  * PHP 8.4 syntax
  *
+ * @test lang.ast.unittest.emit.PHP84Test
  * @see  https://wiki.php.net/rfc#php_84
  */
 class PHP84 extends PHP {