Put test directories of d8-os tests into /tmp/.

test/mjsunit/d8-os.js

Index: test/mjsunit/d8-os.js
diff --git a/test/mjsunit/d8-os.js b/test/mjsunit/d8-os.js
index fd6fb774ea77075d73111d2b707a456be0a19acf..5640326856b9a11562078db3cd80f92203a4a988 100644
--- a/test/mjsunit/d8-os.js
+++ b/test/mjsunit/d8-os.js
@@ -30,7 +30,7 @@
 // implemented on Windows, and even if it were then many of the things
 // we are calling would not be available.
 
-var TEST_DIR = "d8-os-test-directory-" + ((Math.random() * (1<<30)) | 0);
+var TEST_DIR = "/tmp/d8-os-test-directory-" + ((Math.random() * (1<<30)) | 0);
 
 
 function arg_error(str) {
@@ -64,7 +64,7 @@ if (this.os && os.system) {
   os.chdir(TEST_DIR);
   try {
     // Check the chdir worked.
-    os.system('ls', ['../' + TEST_DIR]);
+    os.system('ls', [TEST_DIR]);
     // Simple create dir.
     os.mkdirp("dir");
     // Create dir in dir.
@@ -144,7 +144,6 @@ if (this.os && os.system) {
       //}
     }
   } finally {
-    os.chdir("..");
     os.system("rm", ["-r", TEST_DIR]);
   }