Enable build of some sse2, ssse3, and sse4.1 tests via cmake.

Applies only to the tests that require only the presence of
compiler support. Tests that require an instrinsic flag and an
enabled experiment not included.

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=76

Change-Id: I1ba6ee80cadc3064068db04c15caf8cc2384ab3b
2 files changed