all: typo fix (#29)

Author: quackduck

clipboard_linux.go

@@ -106,7 +106,7 @@ func write(t Format, buf []byte) (<-chan struct{}, error) {
 	start := make(chan int)
 	done := make(chan struct{}, 1)
 
-	go func() { // surve as a daemon until the ownership is terminated.
+	go func() { // serve as a daemon until the ownership is terminated.
 		runtime.LockOSThread()
 		defer runtime.UnlockOSThread()