unit-test: Use the built-in autoconf-archive

2016-09-16 is too old for the version of lcov that comes with
newer containers. To enable test coverage inside of our unit
test docker, we need a newer autoconf-archive. Use the built in
autoconf-archive as it should be maintained at a similar pace to
other tooling.

Tested:
    sdbusplus with coverage now builds successfully
    phosphor-logging still builds with no changes.

Change-Id: I751aa1c4312603466006b86772be7bfb0aa89dc5
Signed-off-by: William A. Kennington III <wak@google.com>
1 file changed