remove buildinfo_common.sh

The shell script was responsible for appending some system properties
that are common to <partition>/build.prop files. The values of the
system properties were given via environment variables whose names were
slightly different from their corresponding make var names.

This change removes the script and instead write the system properties
directly in Make, thus eliminating the need to keep track of the mapping
across sysprop names, environment variable names, and make var names.

Bug: 117892318
Test: m

Change-Id: I4d88733c1afa30ea0c0c4fcfc2b349f07f7fc090