Bug 908253 - Fix jit-tests's -g command after Bug 858622; r=dminor

--HG--
extra : rebase_source : 6c6a02b63e653d7f87671b1e9b80ab9d4161bb91

js/src/jit-test/jit_test.py

@@ -201,7 +201,7 @@ def main(argv):
             sys.exit(1)
 
         tc = job_list[0]
-        cmd = ['gdb', '--args'] + tc.command(prefix)
+        cmd = ['gdb', '--args'] + tc.command(prefix, jittests.LIB_DIR)
         subprocess.call(cmd)
         sys.exit()