publish-tdl.yml: Move to centos:7 devtoolset-9

Move from prebuild/centos7-devtoolset7 to centos:7 with devtoolset-9
(the same version Holy Build Box uses, which is used in prebuilt-tdlib).
This image has a newer gcc version, hopefully fixing a compilation error
that was present with gcc 7.

Note: We don't link libstdc++ statically to reduce the binary size
(about 1.1M with statically linked libstdc++) and consequently the npm
package size. This is the same as before this commit, since
prebuildify-cross links libstdc++ dynamically as well.

.github/workflows/publish-tdl.yml

@@ -27,13 +27,28 @@ jobs:
         run: npm install
       - name: Clean old binaries
         run: npm run clean -w tdl
-      # prebuildify-cross doesn't work with npm workspaces
       - name: Prebuildify in docker
         if: runner.os == 'Linux'
         run: |
-          docker run -u root -v $(pwd):/app ghcr.io/prebuild/centos7-devtoolset7:2 \
-            npm run make-prebuild -w tdl -- --tag-libc
-          tree packages/tdl
+          # docker run -u root -v $(pwd):/app ghcr.io/prebuild/centos7-devtoolset7:2 \
+          #  npm run make-prebuild -w tdl -- --tag-libc
+          cat > prebuilt-node-addon.sh <<EOF
+          set -ex
+          yum update -y
+          yum search devtoolset
+          yum install -y centos-release-scl devtoolset-9 make python3
+          yum install https://rpm.nodesource.com/pub_16.x/nodistro/repo/nodesource-release-nodistro-1.noarch.rpm -y
+          yum install nodejs -y --setopt=nodesource-nodejs.module_hotfixes=1
+          source /opt/rh/devtoolset-9/enable
+          gcc --version
+          ldd --version
+          cd /app
+          npm run make-prebuild -w tdl -- --tag-libc
+          EOF
+          docker run -v $(pwd):/app centos:7 \
+            bash /app/prebuilt-node-addon.sh
+          ldd packages/tdl/prebuilds/*/*.node
+          du -hs packages/tdl/prebuilds/*/*.node
       - name: Prebuildify
         if: runner.os != 'Linux'
         run: npm run make-prebuild -w tdl