Add kobov4 & kobov5 targets

kobov4 exists solely because there's a dedicated TC for it,
but we don't distribute binaries for it (it doesn't differ enough from
kobo, and experience has taught us that this kind of split was not a
great idea (e.g., kindle5 vs. kindlepw2)).

kobov5 targets a massively updated userland, and requires further
changes, including to the delivery mechanism, so it very much warrants a
dedicated package (re: #12401)

frontend/device/kobo/device.lua

@@ -978,6 +978,12 @@ function Kobo:init()
         self:toggleKeyRepeat(false)
     end
 
+    -- Switch to the proper packages on FW 5.x
+    -- NOTE: We don't distribute kobov4 binaries, the omission is on purpose.
+    if util.fileExists("/usr/bin/hwdetect.sh") then
+        self.ota_model = "kobov5"
+    end
+
     -- Finally, Let Generic properly setup the standard stuff.
     -- (Of particular import, this needs to come *after* we've set our input hooks, so that the viewport translation runs last).
     Generic.init(self)

kodev

@@ -141,6 +141,8 @@ TARGET:
     kindlepw2                 With compiler optimizations for Kindle models >= Paperwhite 2
     kindle-legacy             Needed only for Kindle2/3/DXG
     kobo
+    kobov4                    Compatible with Mk.7+ Kobo devices on FW 4.x
+    kobov5                    Compatible with all Kobo & Tolino devices on FW 5.x
     linux
     macos                     MacOS app bundle
     pocketbook
@@ -174,7 +176,7 @@ function setup_target() {
             ;;
         cervantes) ;;
         kindle | kindlehf | kindlepw2 | kindle-legacy) ;;
-        kobo) ;;
+        kobo | kobov4 | kobov5) ;;
         pocketbook) ;;
         remarkable) ;;
         sony-prstux) ;;

make/kobo.mk

@@ -1,6 +1,6 @@
 KOBO_DIR = $(PLATFORM_DIR)/kobo
-KOBO_PACKAGE = koreader-kobo$(KODEDUG_SUFFIX)-$(VERSION).zip
-KOBO_PACKAGE_OTA = koreader-kobo$(KODEDUG_SUFFIX)-$(VERSION).targz
+KOBO_PACKAGE = koreader-$(DIST)$(KODEDUG_SUFFIX)-$(VERSION).zip
+KOBO_PACKAGE_OTA = koreader-$(DIST)$(KODEDUG_SUFFIX)-$(VERSION).targz
 
 update: all
 	# ensure that the binaries were built for ARM

make/kobov4.mk

@@ -0,0 +1 @@
+include make/kobo.mk

make/kobov5.mk

@@ -0,0 +1 @@
+include make/kobo.mk