[autotest] Add .conf to autotest-server apache site config file name.

Apache installed in Ubuntu 14 (trusty) does not recognize site config file
not ends with .conf.

BUG=None
TEST=tested in a trusty vm, test the script also works in Ubuntu 12.04
(chromeos-autotest.cbf)

Change-Id: I706c9c214ef3b5bd5b5912a901b6e6a37a7be8c4
Reviewed-on: https://chromium-review.googlesource.com/227611
Tested-by: Dan Shi <dshi@chromium.org>
Reviewed-by: Prashanth B <beeps@chromium.org>
Commit-Queue: Dan Shi <dshi@chromium.org>
1 file changed