Revert bullet lib modification
revert bullet's change (#448) * Revert "fix bullet can not work normaly at unit test (#447)" This reverts commit 77cd49d3eb710e7466bff528ad9067c0b8d2875d. * Revert "fix bullet can not work normaly at taobao_creative_app (#446)" This reverts commit 99dc2d776fce8ce84c99091aca3ea74b88d6aeff. * revert bullet's change