src: use %progbits instead of @progbits

While @progbits is preferred for most architectures, there are some
(notably 32-bit ARM) for which it does not. %progbits is effective
everywhere.

See https://bugzilla.redhat.com/show_bug.cgi?id=1950528 for more
details.

Related: https://github.com/nodejs/node/issues/17933
Related: https://github.com/nodejs/node/pull/37688



Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>

PR-URL: https://github.com/nodejs/node/pull/38312


Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>