fix packing problem with latest vendor_kernel_boot.img

Fix: Issue #175

>>> import java.io.File
>>> println(File("").length())
4096

Author: cfig

bbootimg/src/main/kotlin/bootimg/v3/VendorBoot.kt

@@ -1,4 +1,4 @@
-// Copyright 2020-2025 yuyezhong@gmail.com
+// Copyright 2020-2026 yuyezhong@gmail.com
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -370,7 +370,7 @@ data class VendorBoot(
             vrtSize = ramdisk_table.eachEntrySize * ramdisk_table.ramdidks.size,
             vrtEntryNum = ramdisk_table.ramdidks.size,
             vrtEntrySize = ramdisk_table.eachEntrySize,
-            bootconfigSize = File(bootconfig.file).length().toInt()
+            bootconfigSize = if (bootconfig.file.isNotBlank()) File(bootconfig.file).length().toInt() else 0
         ).feature67()
     }
 

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.3.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.0-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

integrationTest.py

@@ -197,6 +197,8 @@ def main():
         log.info("sparse image is not supported on OS other than Linux, skip testing")
     # Issue 134: multiple DTs
     verifySingleDir(resDir3, "issue_134_multiple_DTs")
+    # Issue 175: GKI vendor_kernel_boot
+    verifySingleDir(resDir3, "issue_175_no_bootconfig_in_vkb")
     # legacy OTA support
     verifySingleDir(resDir3, "legacy_OTA")