Move root car to pycar, put other pycar back to car.

pycar/build.gradle

@@ -0,0 +1,28 @@
+configurations {
+    python {
+        canBeResolved = true
+        canBeConsumed = false
+    }
+}
+
+dependencies {
+    python project(path: ':protobuf', configuration: 'python')
+}
+
+task copyPythonCode(type: Copy, dependsOn: configurations.python){
+    // Copy python protobuf code from proto project.
+    from zipTree(configurations.python.asPath)
+    into 'src'
+}
+
+task build(type: Exec, dependsOn: copyPythonCode) {
+    executable 'python3'
+    args 'setup.py', 'bdist_wheel'
+}
+
+task clean {
+    doLast {
+        delete 'dist'
+        delete 'build'
+    }
+}