Re-enable disabled tests under TSan.
Re-enable disabled tests under TSan.

These tests point to an already-fixed bug, this should no longer have a
data race.

BUG=webm:1049

Change-Id: Iaedc5db8df99362bdc501b70ff7fdebf8756fdb8

ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx,webmproject/libvpx,webmproject/libvpx,webmproject/libvpx,ShiftMediaProject/libvpx