Fix a regression

Author: cedx

run.hxml

@@ -1,3 +1,4 @@
 --js bin/php_minifier.js
+--macro php_minifier.Macro.shebang("node")
 --main php_minifier.Program
 share/build.hxml

src/php_minifier/Macro.hx

@@ -0,0 +1,17 @@
+package php_minifier;
+
+#if macro
+import haxe.macro.Compiler;
+import haxe.macro.Context;
+import sys.io.File;
+
+/** Provides initialization macros. **/
+@:noDoc abstract class Macro {
+
+	/** Adds a shebang to the compiled file. **/
+	public static function shebang(executable: String) Context.onAfterGenerate(() -> {
+		final path = Compiler.getOutput();
+		File.saveContent(path, '#!/usr/bin/env $executable\n${File.getContent(path)}');
+	});
+}
+#end