[Maintenance] Update gradle clean helper

build.gradle

@@ -5,11 +5,6 @@ plugins {
     id 'app.opendocument.conanandroidgradleplugin' version '0.9.2' apply false
 }
 
-task clean(type: Delete) {
-    delete rootProject.buildDir
-    delete new File(projectDir, "wvWare/.cxx")
-}
-
 group = 'app.opendocument'
 version = '1.2.11'
 

wvWare/build.gradle

@@ -138,3 +138,12 @@ if (System.getenv('SIGNING_KEY')) {
         sign publishing.publications.release
     }
 }
+
+// Without removing .cxx dir on cleanup, double gradle clean is erroring out.
+// Before removing this workaround, check if "./gradlew assembleDebug; ./gradlew clean; ./gradlew clean" works
+tasks.named("clean") {
+    def dotCxxDir = getLayout().getProjectDirectory().dir(".cxx")
+    doFirst {
+        delete dotCxxDir
+    }
+}