fix wasm build

Author: jerson

Makefile.wasm

@@ -12,6 +12,6 @@ wasm_tinygo:
 wasm:
 	mkdir -p output/wasm
 	cd wasm && GOARCH=wasm GOOS=js go build -ldflags="-s -w" -o ../output/wasm/rsa.wasm main.go
-	cp $(GO_ROOT)/misc/wasm/wasm_exec.js  output/wasm/wasm_exec.js
+	cp $(GO_ROOT)/lib/wasm/wasm_exec.js  output/wasm/wasm_exec.js
 	cp output/wasm/rsa.wasm wasm/example/public/rsa.wasm
 	cp output/wasm/wasm_exec.js  wasm/example/public/wasm_exec.js