recent database change breaks build with ECL

[Qian Yun]

The recent commit "Implement part of database handling in Boot"
https://github.com/fricas/fricas/commit/5b7d31631e69d110d3c5e14535679641135f24b2

breaks build with ECL on Linux (and macOS):

)compile A1AGG.spad
........
>> System error:
The function (SETF |database-ancestors|) is undefined.

- Qian

[Waldek Hebisch]

Looks like ECL bug. At least error message makes no sense:
the function is defined and one can call it from interpsys
command line.

--
Waldek Hebisch