Rollup merge of rust-lang#56562 - pnkfelix:issue-55465-update-libc-version, r=alexcrichton

Update libc version required by rustc

This is meant to be an easy-to-backport fix for rust-lang#55465

Author: kennytm

src/librustc_codegen_ssa/Cargo.toml

@@ -16,7 +16,7 @@ num_cpus = "1.0"
 rustc-demangle = "0.1.4"
 memmap = "0.6"
 log = "0.4.5"
-libc = "0.2.43"
+libc = "0.2.44"
 jobserver = "0.1.11"
 
 serialize = { path = "../libserialize" }