Add missing variables since previous cherry-pick

build/android/build.gradle

@@ -15,6 +15,13 @@ allprojects {
 	}
 }
 
+def curl_version = "7.60.0"
+def gmp_version = "6.1.2"
+def irrlicht_revision = "5150"
+def openal_version = "1.18.2"
+def openssl_version = "1.0.2n"
+def sqlite3_version = "3260000"
+
 apply plugin: "com.android.application"
 
 android {