[buildbot] docker,worker: install g++-multilib

[LEDE Commits]

ynezz pushed a commit to buildbot.git, branch master:
https://git.openwrt.org/6b145dbf190c52caa1829f6dcfdc9e304552bd5a

commit 6b145dbf190c52caa1829f6dcfdc9e304552bd5a
Author: Alois Klink <alois at aloisklink.com>
AuthorDate: Wed Nov 23 17:23:48 2022 +0000

    docker,worker: install g++-multilib
    
    From [openwrt/docker at 5484951][1] (GitHub PR [#89][2]):
    
    Node fails to cross-compile from a 64-bit build machine to 32-bit host
    with the following error:
    
    ```
      In file included from /usr/include/c++/8/memory:62,
      from ../deps/v8/src/libplatform/default-foreground-task-runner.h:8,
      from ../deps/v8/src/libplatform/default-foreground-task-runner.cc:5:
      /usr/include/c++/8/bits/stl_algobase.h:59:10: fatal error: bits/c++config.h:
        No such file or directory
      #include <bits/c++config.h>
              ^~~~~~~~~~~~~~~~~~
      compilation terminated.
    ```
    
    On Debian, `g++-multilib` can be installed to fix this.
    
    [1]: https://gitlab.com/openwrt/docker/-/commit/54849510d7802028b94757051cca6d004a9ca1d1
    [2]: https://github.com/openwrt/docker/pull/89
    
    Fixes: https://github.com/openwrt/packages/issues/18476
    Fixes: https://forum.openwrt.org/t/why-arent-the-node-and-node-npm-packages-available-on-arm-cortex-a9-vfpv3-d16-in-22-03-2/142722
    Signed-off-by: Alois Klink <alois at aloisklink.com>
---
 docker/buildworker/Dockerfile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docker/buildworker/Dockerfile b/docker/buildworker/Dockerfile
index 55babe4..09c38ee 100644
--- a/docker/buildworker/Dockerfile
+++ b/docker/buildworker/Dockerfile
@@ -18,6 +18,7 @@ RUN \
 		ccache \
 		curl \
 		gawk \
+		g++-multilib \
 		gcc-multilib \
 		genisoimage \
 		git-core \