scripts/build-unit-test-docker: Update googletest to match poky

googletest doesn't regularly tag releases even though they are
constantly making improvements. The source is now 2 years old and the
yocto poky build has moved on to this commit.

Change-Id: I867ead5f89fecc9c854626cd07fc8d1a6a9cc5af
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed