test: fixtures in test-http2-respond-file-fd-range

PR-URL: https://github.com/nodejs/node/pull/15878
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

test/parallel/test-http2-respond-file-fd-range.js

@@ -5,9 +5,9 @@
 const common = require('../common');
 if (!common.hasCrypto)
   common.skip('missing crypto');
+const fixtures = require('../common/fixtures');
 const http2 = require('http2');
 const assert = require('assert');
-const path = require('path');
 const fs = require('fs');
 
 const {
@@ -15,7 +15,7 @@ const {
   HTTP2_HEADER_CONTENT_LENGTH
 } = http2.constants;
 
-const fname = path.resolve(common.fixturesDir, 'printA.js');
+const fname = fixtures.path('printA.js');
 const data = fs.readFileSync(fname);
 const fd = fs.openSync(fname, 'r');