8313707: GHA: Bootstrap sysroots with --variant=minbase

Backport-of: 29f1d8ef50e3b4b235177fd9642a1fcf26fe3bab

Author: shipilev

.github/workflows/build-cross-compile.yml

@@ -140,6 +140,7 @@ jobs:
           --verbose
           --include=fakeroot,symlinks,build-essential,libx11-dev,libxext-dev,libxrender-dev,libxrandr-dev,libxtst-dev,libxt-dev,libcups2-dev,libfontconfig1-dev,libasound2-dev,libfreetype6-dev,libpng-dev
           --resolve-deps
+          --variant=minbase
           $(test -n "${{ matrix.debian-keyring }}" && echo "--keyring=${{ matrix.debian-keyring }}")
           ${{ matrix.debian-version }}
           sysroot