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

Promote `googletest` to v1.11 to match openembedded.
See https://github.com/openembedded/meta-openembedded/blob/master/meta-oe/recipes-test/googletest/googletest_git.bb#L7

Signed-off-by: Michael Shen <gpgpgp@google.com>
Change-Id: I19d315cffc6b7fffaddba7b07a4bd9c7d7533b8d
1 file changed