Use termios via CGO only on Linux

Signed-off-by: Yohei Ueda <yohei@jp.ibm.com>

term/tc_other.go

@@ -0,0 +1,19 @@
+// +build !windows
+// +build !linux !cgo
+
+package term
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func tcget(fd uintptr, p *Termios) syscall.Errno {
+	_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, uintptr(getTermios), uintptr(unsafe.Pointer(p)))
+	return err
+}
+
+func tcset(fd uintptr, p *Termios) syscall.Errno {
+	_, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, setTermios, uintptr(unsafe.Pointer(p)))
+	return err
+}