reexport c feature

Author: tgross35

builtins-test-intrinsics/Cargo.toml

@@ -6,3 +6,6 @@ edition = "2021"
 [dependencies]
 compiler_builtins = { path = "../compiler-builtins", features = ["compiler-builtins"]}
 panic-handler = { path = '../crates/panic-handler' }
+
+[features]
+c = "compiler_builtins/c"