[Sheriff] Mark flaky webkit test.

TBR=jkummerow@chromium.org
BUG=v8:2989

Review URL: https://codereview.chromium.org/68573003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17684 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Change table size for trigonometric functions.

Sunspider verifies floating point results to the last bit, so this is to
make sure that we return the expected result.

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/71123003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17685 ce2b1a6d-e550-0410-aec6-3dcde31c8c00