test: create a broken link inside temp directory

No change to logic. This updates a test case to create the files it
needs inside the temp directory instead of in the repo itself. This is
helpful in case the test case fails early, that way we don't leave this
file behind.

This contributes toward #828, since the change to fast-glob made it
clear that this test was mishandling link files and leaving side effects
in the git repo.

test/touch.js

@@ -186,10 +186,10 @@ test('file array', t => {
 
 test('touching broken link creates a new file', t => {
   utils.skipOnWin(t, () => {
-    const result = shell.touch('test/resources/badlink');
+    shell.ln('-s', 'not_existed_file', `${t.context.tmp}/badlink2`);
+    const result = shell.touch(`${t.context.tmp}/badlink2`);
     t.is(result.code, 0);
     t.falsy(shell.error());
-    t.truthy(fs.existsSync('test/resources/not_existed_file'));
-    shell.rm('test/resources/not_existed_file');
+    t.truthy(fs.existsSync(`${t.context.tmp}/not_existed_file`));
   });
 });