Emit a default memory.x alongside device.x from metapac.

stm32-metapac-gen/src/assets/build.rs

@@ -9,6 +9,14 @@ fn main() {
         .unwrap()
         .to_ascii_lowercase();
 
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    //File::create(out.join("memory.x"))
+        //.unwrap()
+        //.write_all(include_bytes!("memory.x"))
+        //.unwrap();
+
     #[cfg(feature = "rt")]
     println!("cargo:rustc-link-search=src/chips/{}", _chip_name);