std: Don't build docs for misc facade crates

Retain the same behavior as stable.

Closes rust-lang#38319

src/bootstrap/doc.rs

@@ -146,7 +146,8 @@ pub fn std(build: &Build, stage: u32, target: &str) {
     let mut cargo = build.cargo(&compiler, Mode::Libstd, target, "doc");
     cargo.arg("--manifest-path")
          .arg(build.src.join("src/rustc/std_shim/Cargo.toml"))
-         .arg("--features").arg(build.std_features());
+         .arg("--features").arg(build.std_features())
+         .arg("-p").arg("std");
     build.run(&mut cargo);
     cp_r(&out_dir, &out)
 }

src/liballoc_jemalloc/Cargo.toml

@@ -9,6 +9,7 @@ links = "jemalloc"
 name = "alloc_jemalloc"
 path = "lib.rs"
 test = false
+doc = false
 
 [dependencies]
 core = { path = "../libcore" }

src/liballoc_system/Cargo.toml

@@ -7,6 +7,7 @@ version = "0.0.0"
 name = "alloc_system"
 path = "lib.rs"
 test = false
+doc = false
 
 [dependencies]
 core = { path = "../libcore" }

src/libcompiler_builtins/Cargo.toml

@@ -9,6 +9,7 @@ name = "compiler_builtins"
 path = "lib.rs"
 test = false
 bench = false
+doc = false
 
 [dependencies]
 core = { path = "../libcore" }

src/libpanic_abort/Cargo.toml

@@ -7,6 +7,7 @@ version = "0.0.0"
 path = "lib.rs"
 test = false
 bench = false
+doc = false
 
 [dependencies]
 core = { path = "../libcore" }

src/libpanic_unwind/Cargo.toml

@@ -7,6 +7,7 @@ version = "0.0.0"
 path = "lib.rs"
 test = false
 bench = false
+doc = false
 
 [dependencies]
 alloc = { path = "../liballoc" }

src/librand/Cargo.toml

@@ -6,6 +6,7 @@ version = "0.0.0"
 [lib]
 name = "rand"
 path = "lib.rs"
+doc = false
 
 [dependencies]
 core = { path = "../libcore" }

src/libunwind/Cargo.toml

@@ -9,6 +9,7 @@ name = "unwind"
 path = "lib.rs"
 test = false
 bench = false
+doc = false
 
 [dependencies]
 core = { path = "../libcore" }

src/rustc/libc_shim/Cargo.toml

@@ -17,6 +17,7 @@ name = "libc"
 path = "../../liblibc/src/lib.rs"
 test = false
 bench = false
+doc = false
 
 [dependencies]
 core = { path = "../../libcore" }

src/rustc/std_shim/Cargo.toml

@@ -27,6 +27,7 @@ authors = ["The Rust Project Developers"]
 [lib]
 name = "std_shim"
 path = "lib.rs"
+doc = false
 
 [dependencies]
 std = { path = "../../libstd" }