Make test_x_server.py executable.
Make test_x_server.py executable.

BUG=98834
TEST= test_x_server.py is executable

Review URL: https://chromiumcodereview.appspot.com/9407020

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@123983 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build