Update of common submodule breaks build

This commit broke the autotools build : 31a98a88

Simple way to reproduce. Go in clean gst-python checkout and do ./autogen.sh.

The problem seems to be that autogen.sh has not been using the common/update-autogen script for the past 4 years, and therefore is using old features (such as version_check, die_check, ...).

Until that issue is fixed, I propose to revert that submodule update commit.