Android : use pEpEngine system.db build

android/build.gradle

@@ -7,6 +7,7 @@ def buildAutomatic = hasProperty('buildAutomatic') ? buildAutomatic : "true"
 def pEpAppPackageName = hasProperty('pEpAppPackageName') ? pEpAppPackageName : "com.pep.k9"
 
 def pEpEngineAndroid = new File(new File(pEpEngineSrc), 'build-android')
+def pEpEngineDB = new File(new File(pEpEngineSrc), 'db')
 def libetpanAndroid = new File(new File(pEpEngineSrc), '../libetpan/build-android')
 
 def externalInstallDir = file('external/data/data/' + pEpAppPackageName + '/app_opt')
@@ -99,12 +100,23 @@ android {
         unzipDeps.dependsOn buildpEpEngine
     }
 
+    // builds pEpEnginge's system.db 
+    task buildpEpEngineSystemDB(type:Exec) {
+        workingDir pEpEngineDB
+        commandLine 'make', 'system.db'
+    }
+
     // copy pEpEnginge's system.db to asset 
     task cpDBAssets(type: Copy) {
-        from file(new File(new File(pEpEngineSrc), 'db/system.db'))
+        from file(new File(pEpEngineDB, 'system.db'))
         into 'assets'
     }
 
+    if(buildAutomatic=="true"){
+        cpDBAssets.dependsOn buildpEpEngineSystemDB
+    }
+
+
     // call regular ndk-build(.cmd) script from app directory
     task jniBuild(type: Exec) {
         commandLine getNdkBuildCmd(), 'V=1', 'GPGBUILD='+externalInstallDir.absolutePath