rust: Emit frame pointers on 64-bit device targets.

Frame pointers can aid in unwinding and reading stack traces.

Bug: 298267402
Test: m rust
Change-Id: I48bf5ef9ffa9912d6af5fc2b7297f250d15718ea
diff --git a/rust/config/riscv64_device.go b/rust/config/riscv64_device.go
index d014dbf..e9aa8ef 100644
--- a/rust/config/riscv64_device.go
+++ b/rust/config/riscv64_device.go
@@ -21,7 +21,9 @@
 )
 
 var (
-	Riscv64RustFlags            = []string{}
+	Riscv64RustFlags = []string{
+		"-C force-frame-pointers=y",
+	}
 	Riscv64ArchFeatureRustFlags = map[string][]string{"": {}}
 	Riscv64LinkFlags            = []string{}