test(namespace): extend global constant import coverage

tests/compiler/namespace/use-const-single-segment.phpt

@@ -1,9 +1,11 @@
 --TEST--
-use const with a single-segment (global) constant name
+use const with single-segment global names, aliases, and runtime constants
 --FILE--
 <?php
 namespace App {
     use const PHP_EOL;
+    use const PHP_EOL as LINE_END;
+    use const TYPEPHP_RUNTIME_SINGLE_SEGMENT as RUNTIME_VALUE;
 
     const ANSWER = 42;
 
@@ -11,6 +13,16 @@ namespace App {
     {
         return "hello" . PHP_EOL;
     }
+
+    function helloAlias(): string
+    {
+        return "alias" . LINE_END;
+    }
+
+    function runtimeValue(): string
+    {
+        return RUNTIME_VALUE;
+    }
 }
 
 namespace {
@@ -19,10 +31,17 @@ namespace {
     function main(): void
     {
         echo \App\hello();
+        echo \App\helloAlias();
         echo ANSWER, "\n";
+
+        define('TYPEPHP_RUNTIME_SINGLE_SEGMENT', 'runtime-value');
+        define('RUNTIME_VALUE', 'wrong-alias-fallback');
+        echo \App\runtimeValue(), "\n";
     }
 }
 ?>
 --EXPECT--
 hello
+alias
 42
+runtime-value