add rustc build flags reflection

Signed-off-by: Jason Volk <jason@zemos.net>

Cargo.lock

@@ -681,6 +681,7 @@ dependencies = [
  "chrono",
  "conduit_macros",
  "const-str",
+ "ctor",
  "either",
  "figment",
  "hardened_malloc-rs",
@@ -1018,6 +1019,16 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "ctor"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edb49164822f3ee45b17acd4a208cfc1251410cf0cad9a833234c9890774dd9f"
+dependencies = [
+ "quote",
+ "syn 2.0.71",
+]
+
 [[package]]
 name = "curve25519-dalek"
 version = "4.1.3"