Kernel+LibC: Add _SC_TTY_NAME_MAX

Author: https://github.com/linusg
Commit: 2cc3d68615
Pull-request: https://github.com/SerenityOS/serenity/pull/5001
Reviewed-by: https://github.com/alimpfard

Userland/Libraries/LibC/unistd.h

@@ -172,14 +172,16 @@ enum {
 enum {
     _SC_NPROCESSORS_CONF,
     _SC_NPROCESSORS_ONLN,
-    _SC_PAGESIZE,
     _SC_OPEN_MAX,
+    _SC_TTY_NAME_MAX,
+    _SC_PAGESIZE,
 };
 
 #define _SC_NPROCESSORS_CONF _SC_NPROCESSORS_CONF
 #define _SC_NPROCESSORS_ONLN _SC_NPROCESSORS_ONLN
-#define _SC_PAGESIZE _SC_PAGESIZE
 #define _SC_OPEN_MAX _SC_OPEN_MAX
+#define _SC_PAGESIZE _SC_PAGESIZE
+#define _SC_TTY_NAME_MAX _SC_TTY_NAME_MAX
 
 long sysconf(int name);