Auto merge of #31785 - sanxiyn:gitmodules, r=alexcrichton
Auto merge of #31785 - sanxiyn:gitmodules, r=alexcrichton

libc moved from rust-lang-nursery to rust-lang.

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