VEA unittest: add a test case for cache line-alignment

Linux refuses to accept buffers that have sizes ualigned to
CPU cache line, which can be 128 bytes on certain devices.
This test inputs a frame that has unaligned size of U and V
planes to catch such errors.

BUG=664039
TEST=Run VEA unittest on Kevin.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2525563005
Cr-Commit-Position: refs/heads/master@{#435179}
1 file changed