ginkgo: Import releasetools.py

From: https://github.com/LineageOS/android_device_xiaomi_ginkgo/blob/lineage-20/releasetools.py

Change-Id: Ib15588cd928761af8d0c61163e1fbbb1830a8cf8
Signed-off-by: Skyblueborb <tomaszborbely0710@gmail.com>

BoardConfig.mk

@@ -31,5 +31,8 @@ TARGET_VENDOR_PROP += $(DEVICE_PATH)/vendor.prop
 # Recovery
 TARGET_RECOVERY_FSTAB := $(DEVICE_PATH)/rootdir/etc/fstab.qcom
 
+# Releasetools
+TARGET_RELEASETOOLS_EXTENSIONS := $(DEVICE_PATH)
+
 # Inherit from the proprietary version
 include vendor/xiaomi/ginkgo/BoardConfigVendor.mk

releasetools.py

@@ -0,0 +1,36 @@
+#
+# Copyright (C) 2019 The LineageOS Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import common
+
+def FullOTA_InstallEnd(info):
+  OTA_InstallEnd(info)
+
+def IncrementalOTA_InstallEnd(info):
+  OTA_InstallEnd(info)
+
+def AddImage(info, basename, dest):
+  path = "IMAGES/" + basename
+  if path not in info.input_zip.namelist():
+    return
+
+  data = info.input_zip.read(path)
+  common.ZipWriteStr(info.output_zip, basename, data)
+  info.script.AppendExtra('package_extract_file("%s", "%s");' % (basename, dest))
+
+def OTA_InstallEnd(info):
+  info.script.Print("Patching device-tree and verity images...")
+  AddImage(info, "dtbo.img", "/dev/block/bootdevice/by-name/dtbo")
+  AddImage(info, "vbmeta.img", "/dev/block/bootdevice/by-name/vbmeta")