ioctl needs termios2

termios2 has different NCCS than termios's termios.
just stick termios2 in ioctl I guess

src/core/sys/posix/sys/ioctl.d

@@ -24,7 +24,7 @@ nothrow:
 
 version (linux)
 {
-    import core.sys.posix.termios; // termios2
+    import core.sys.posix.termios; // tcflag_t, speed_t, cc_t
 
     enum _IOC_NRBITS = 8;
     enum _IOC_TYPEBITS = 8;
@@ -99,6 +99,20 @@ version (linux)
     enum IOCSIZE_MASK = _IOC_SIZEMASK << _IOC_DIRSHIFT;
     enum IOCSIZE_SHIFT = _IOC_SIZESHIFT;
 
+    enum NCCS = 19;
+
+    struct termios2
+    {
+        tcflag_t c_iflag;
+        tcflag_t c_oflag;
+        tcflag_t c_cflag;
+        tcflag_t c_lflag;
+        cc_t c_line;
+        cc_t[NCCS] c_cc;
+        speed_t c_ispeed;
+        speed_t c_ospeed;
+    }
+
     struct winsize
     {
         ushort ws_row;