Update Makefile

Bindings/CXX/Makefile

@@ -1,8 +1,8 @@
 shared:
-	go build -buildmode=c-shared -o psi.dylib psi.go
+	go build -buildmode=c-shared -o psi.dylib main.go
 .PHONY: shared
 
 static:
-	go build -buildmode=c-archive -o psi.a psi.go
+	go build -buildmode=c-archive -o psi.a main.go
 
 .PHONY: static