chore: add flake.nix to v1.36.1

flake.nix

@@ -0,0 +1,28 @@
+{
+  description = "AWS-LC is a general-purpose cryptographic library";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+
+  outputs = { self, nix, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in rec {
+        packages.aws-lc = pkgs.stdenv.mkDerivation {
+          src = self;
+          name = "aws-lc";
+          inherit system;
+          nativeBuildInputs = [ pkgs.ninja pkgs.cmake pkgs.perl ];
+          cmakeFlags = [ "-GNinja" "-DDISABLE_GO=ON" ];
+          checkPhase = ''
+            ninja run_minimal_tests
+          '';
+        };
+        formatter = pkgs.nixfmt;
+        packages.default = packages.aws-lc;
+        packages.aws-lc-test = packages.aws-lc.overrideAttrs
+         (finalAttrs: previousAttrs: {
+            doCheck = true;
+            });
+      });
+}
+