Rollup merge of #40173 - er-1:master, r=alexcrichton
Rollup merge of #40173 - er-1:master, r=alexcrichton

Add a reference to the dl library to the Makefile of the test issue-2…

…4445.

It prevents the test to fail on ppc64el at least.

Part of #39015

GBGamer/rust,graydon/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,GBGamer/rust