Run Script: fix working directory handling

Previously, "haxelib run flixel tools configure ." wouldn't work correctly (it would add the files to flixel itself rather the the cwd).
Also pass on the exit code.

Author: Gama11

run.n

@@ -0,0 +1,5 @@
+{
+    "haxe.displayConfigurations": [
+        ["build.hxml"]
+    ]
+}

script/.vscode/settings.json

@@ -0,0 +1,18 @@
+{
+    "version": "2.0.0",
+    "command": "haxe",
+    "args": ["build.hxml"],
+    "problemMatcher": {
+        "owner": "haxe",
+        "pattern": {
+            "regexp": "^(.+):(\\d+): (?:lines \\d+-(\\d+)|character(?:s (\\d+)-| )(\\d+)) : (?:(Warning) : )?(.*)$",
+            "file": 1,
+            "line": 2,
+            "endLine": 3,
+            "column": 4,
+            "endColumn": 5,
+            "severity": 6,
+            "message": 7
+        }
+    }
+}

script/.vscode/tasks.json

@@ -8,7 +8,8 @@ class RunScript
 	public static function main()
 	{
 		var args = Sys.args();
-		args.pop(); // working directory path
-		Sys.command("haxelib",  ["run", "flixel-tools"].concat(args));
+		var cwd = args.pop();
+		Sys.setCwd(cwd);
+		Sys.exit(Sys.command("haxelib", ["run", "flixel-tools"].concat(args)));
 	}
 }