Rollup merge of #74257 - alex:patch-1, r=joshtriplett
Rollup merge of #74257 - alex:patch-1, r=joshtriplett

don't mark linux kernel module targets as a unix environment

refs #74247

r?@joshtriplett

cc: da39a3ee5e6b4b0d3255bfef95601890afd80709@ehuss

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