[Keyboard] Add keyboard Reviung39 (#6620)

* add keyboards/reviung39

* fix reviung39/keymaps/default/

* [Keymap] add keymap default_s for reviung39 type-s

* [keymap] fix default and default_s

* [keymap] remove backup directory(keyboards/reviung39/backup/)

* [keymap] Update readme.md

* [keyboards] fix keyboards/reviung39/reviung39.h, rules.mk, /keymaps/default/keymap.c

* [keymap] fix /default_s/keymap.c

* Update readme.md

* Update readme.md

* fix rules.mk

* [keymaps] fix default/keymap.c

keyboards/reviung39/reviung39.c

@@ -0,0 +1,51 @@
+/* Copyright 2019 gtips
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "reviung39.h"
+
+// Optional override functions below.
+// You can leave any or all of these undefined.
+// These are only required if you want to perform custom actions.
+
+/*
+
+void matrix_init_kb(void) {
+  // put your keyboard start-up code here
+  // runs once when the firmware starts up
+
+  matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+  // put your looping keyboard code here
+  // runs every cycle (a lot)
+
+  matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+  // put your per-action keyboard code here
+  // runs for every action, just before processing by the firmware
+
+  return process_record_user(keycode, record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+  // put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+
+  led_set_user(usb_led);
+}
+
+*/