Auto merge of #7485 - camsteffen:add-test-externs, r=flip1995
Auto merge of #7485 - camsteffen:add-test-externs, r=flip1995

Add to test third party crates list

changelog: none

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