import: make it work most of the time with git repos

This includes real tests too.

tests/source-files/com.anpmech.launcher/build.gradle

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2015-2017 Hayai Software
+ * Copyright 2018 The KeikaiLauncher 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.
+ */
+
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    repositories {
+        jcenter()
+        google()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.2.1'
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+        google()
+    }
+}
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'org.owasp:dependency-check-gradle:5.2.4'
+    }
+}
+apply plugin: 'org.owasp.dependencycheck'
+dependencyCheck {
+    format='JSON'
+}