Always enable cc even if the feature is not enabled.

Some Debian architectures need outline asm, and Debian does not ship pre-built
outline asm.

Index: rust/vendor/rustix-0.37.6/build.rs
===================================================================
--- rust.orig/vendor/rustix-0.37.6/build.rs
+++ rust/vendor/rustix-0.37.6/build.rs
@@ -1,4 +1,3 @@
-#[cfg(feature = "cc")]
 use cc::Build;
 use std::env::var;
 use std::io::Write;
@@ -158,16 +157,16 @@ fn link_in_librustix_outline(arch: &str,
     println!("cargo:rerun-if-changed={}", to);
 
     // If "cc" is not enabled, use a pre-built library.
-    #[cfg(not(feature = "cc"))]
+    /*#[cfg(not(feature = "cc"))]
     {
         let _ = asm_name;
         println!("cargo:rustc-link-search={}/{}", OUTLINE_PATH, profile);
         println!("cargo:rustc-link-lib=static={}", name);
-    }
+    }*/
 
     // If "cc" is enabled, build the library from source, update the pre-built
     // version, and assert that the pre-built version is checked in.
-    #[cfg(feature = "cc")]
+    //#[cfg(feature = "cc")]
     {
         let out_dir = var("OUT_DIR").unwrap();
         // Add `-gdwarf-3` so that we always get the same output, regardless of
Index: rust/vendor/rustix-0.37.6/Cargo.toml
===================================================================
--- rust.orig/vendor/rustix-0.37.6/Cargo.toml
+++ rust/vendor/rustix-0.37.6/Cargo.toml
@@ -127,7 +127,6 @@ version = "3.4.0"
 
 [build-dependencies.cc]
 version = "1.0.68"
-optional = true
 
 [features]
 all-apis = [