Fix build failures on several platforms

core/copyTERMUX.go

@@ -11,7 +11,7 @@ import (
 // copyString copies a string to the clipboard.
 func copyString(continuous bool, copySubject string) {
 	cmd := exec.Command("termux-clipboard-set")
-	writeToStdin(cmd, copySubject)
+	WriteToStdin(cmd, copySubject)
 	err := cmd.Run()
 	if err != nil {
 		fmt.Println(AnsiError+"Failed to copy to clipboard:", err.Error()+AnsiReset)
@@ -26,6 +26,6 @@ func copyString(continuous bool, copySubject string) {
 // getClipCommands returns the commands for pasting and clearing the clipboard contents.
 func getClipCommands() (*exec.Cmd, *exec.Cmd) {
 	cmdClear := exec.Command("termux-clipboard-set")
-	writeToStdin(cmdClear, "")
+	WriteToStdin(cmdClear, "")
 	return exec.Command("termux-clipboard-get"), cmdClear
 }