The "TESTFLAGS" is now added to Android .check build to be consistent with other platform build.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/39273004

Patch from Bangfu Tao <bangfu.tao@samsung.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17384 ce2b1a6d-e550-0410-aec6-3dcde31c8c00