fix hardcoded name

sstark · sstark · commit b02a7dd54e7b · 2018-10-12T01:10:24.000+02:00
diff --git a/Makefile b/Makefile
@@ -2,7 +2,7 @@ BIN=	snaprd
 PREFIX=	/usr/local
 
 ${BIN}: *.go Makefile
-	go build -o snaprd
+	go build -o ${BIN}
 
 checkfmt:
 	@gofmt -d *.go
