fixup! one libc

Author: tesuji

library/std/Cargo.toml

@@ -16,6 +16,7 @@ cfg-if = { version = "0.1.8", features = ['rustc-dep-of-std'] }
 panic_unwind = { path = "../panic_unwind", optional = true }
 panic_abort = { path = "../panic_abort" }
 core = { path = "../core" }
+libc = { version = "0.2.79", default-features = false, features = ['rustc-dep-of-std'] }
 compiler_builtins = { version = "0.1.35" }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
 unwind = { path = "../unwind" }
@@ -30,12 +31,6 @@ version = "0.20"
 optional = true
 default-features = false
 features = ['read_core', 'elf', 'macho', 'pe']
-[dependencies.libc]
-version = "0.2"
-default-features = false
-features = ['rustc-dep-of-std']
-git = "https://github.com/lzutao/rust-libc"
-branch = "i78184"
 
 [dev-dependencies]
 rand = "0.7"