generate.pl: Fix slim builds for non-x86{,_64}

We should use zlib1g-dev here instead of lib32z1-dev - the latter is
intended for use in Debian/Ubuntu packaging anyway.

Author: zakame

generate.pl

@@ -55,15 +55,14 @@ sub die_with_sample {
        netbase \
        patch \
        # procps \
-       # zlib1g-dev \
+       zlib1g-dev \
        xz-utils \
-       lib32z1-dev \
        libssl-dev
 EOF
 chomp $docker_slim_run_install;
 
 my $docker_slim_run_purge = <<'EOF';
-savedPackages="ca-certificates make netbase lib32z1-dev libssl-dev" \
+savedPackages="ca-certificates make netbase zlib1g-dev libssl-dev" \
     && apt-mark auto '.*' > /dev/null \
     && apt-mark manual $savedPackages \
     && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \