Revert "manylinux: Update scikit-build from 0.8.1 to 0.9.0"
Revert "manylinux: Update scikit-build from 0.8.1 to 0.9.0"

This reverts commit 8eecfcacb2c5d5ab37ec3cd63887987cc2e4ee83.

scikit-build still has an important regression as described in

  https://github.com/scikit-build/scikit-build/issues/415

thewtex/cross-compilers,dockcross/dockcross,dockcross/dockcross,dockcross/dockcross,dockcross/dockcross,thewtex/cross-compilers,thewtex/cross-compilers,thewtex/cross-compilers