cargoSetupHook: Force frame pointers for !isx86_32

We did this for C in #399014 but not Rust. Add
-Cforce-frame-pointers=yes to rustflags in cargoSetupHook

pkgs/build-support/rust/hooks/default.nix

@@ -91,13 +91,21 @@
         lib.optionalString (stdenv.hostPlatform.config != stdenv.targetPlatform.config) ''
           [target."${stdenv.targetPlatform.rust.rustcTarget}"]
           "linker" = "${pkgsTargetTarget.stdenv.cc}/bin/${pkgsTargetTarget.stdenv.cc.targetPrefix}cc"
-          "rustflags" = [ "-C", "target-feature=${
-            if pkgsTargetTarget.stdenv.targetPlatform.isStatic then "+" else "-"
-          }crt-static" ]
+          "rustflags" = [ ${
+            lib.concatStringsSep ", " (
+              [
+                ''"-Ctarget-feature=${if stdenv.targetPlatform.isStatic then "+" else "-"}crt-static"''
+              ]
+              ++ lib.optional (!stdenv.targetPlatform.isx86_32) ''"-Cforce-frame-pointers=yes"''
+            )
+          } ]
         ''
         + ''
           [target."${stdenv.hostPlatform.rust.rustcTarget}"]
           "linker" = "${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc"
+          "rustflags" = [ ${
+            lib.optionalString (!stdenv.hostPlatform.isx86_32) ''"-Cforce-frame-pointers=yes"''
+          } ]
         '';
     };