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.

TEST=Run VEA unittest on Kevin.

Cr-Commit-Position: refs/heads/master@{#435179}
1 file changed