x86 selftests want a 32 bit runtime

[bhcopeland]

In GitLab by @broonie1 on Jun 6, 2022, 17:35 GMT+1:

The x86 selftests have some coverage for 32 bit userspace which needs build support that is not provided:

Warning: you seem to have a broken 32-bit build
environment.  This will reduce test coverage of 64-bit
kernels.  If you are using a Debian-like distribution,
try:

  apt-get install gcc-multilib libc6-i386 libc6-dev-i386

If you are using a Fedora-like distribution, try:

  yum install glibc-devel.*i686

If you are using a SUSE-like distribution, try:

  zypper install gcc-32bit glibc-devel-static-32bit
make[3]: Leaving directory '/build/stage/linux/tools/testing/selftests/x86'

Migrated from GitLab: https://gitlab.com/Linaro/tuxmake/-/issues/189