Enable MPFR on i586

Author: tgross35

ci/run.sh

@@ -47,6 +47,7 @@ case "$target" in
     x86_64*) extra_flags="$extra_flags --features libm-test/test-multiprecision" ;;
     # i686 works fine, i586 does not
     i686*) extra_flags="$extra_flags --features libm-test/test-multiprecision" ;;
+    i586*) extra_flags="$extra_flags --features libm-test/test-multiprecision" ;;
     # Apple aarch64 is native
     aarch64*apple*) extra_flags="$extra_flags --features libm-test/test-multiprecision" ;;
 esac