Correct the placement of the wrapper rebuild in the build script

coins/monero/build.rs

@@ -63,6 +63,7 @@ fn main() {
         panic!("Failed to cp {}", lib);
       }
     }
+  }
 
   println!("cargo:rerun-if-changed=c/wrapper.c");
   if !Command::new("g++").args(&[
@@ -79,7 +80,6 @@ fn main() {
   ]).current_dir(&Path::new("c")).status().unwrap().success() {
     panic!("g++ failed to build the wrapper");
   }
-  }
 
   println!("cargo:rustc-link-search={}", out_dir);
   println!("cargo:rustc-link-lib=cncrypto");