Updated git submodules

Updated git submodules

Project: releng/builder master b8d6c13f439fda647aeb7a0064e3862562513cd4

Merge "Install git-review using pip install in virtialenv"

Install git-review using pip install in virtialenv

The version of git-review supports --reviewers option which is not
available with the version of the package on centos7 repositories.

Updated the change to handle long workspace names with pip
modules instead of pip, inspired by global-jjb change #5093

Change-Id: I598350d6778760ea320a1128db46da0f80c711db
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>