crossbuild autokpgtest

22:56 < josch> elbrus: hi, i'm planning to add a cross-build test to sbuild to make sure that changes to 
               sbuild do not break cross building (as it recently happened). Such a test would be 
               triggered by linux-libc-dev, libcrypt-dev, libc6-dev, gcc-for-host, binutils, libgcc-s1 
               and make (list by helmut). Having such an autopkgtest would mean that a new glibc upload 
               would not be able to transition to testing until 
22:56 < josch> uploading cross-toolchain-base is also updated. The cross-build test would re-use the apt 
               pinning of debci and should thus be able to properly test what debci intends to get 
               tested. Would you or anybody else in the release team have an objection against such an 
               autopkgtest?

Waiting for https://lists.debian.org/msgid-search/172984426498.2759543.16358037170876429694@localhost