Maven central publish (#1086)

Summary:
Sets up the plugins necessary to publish to Maven Central.

Pull Request resolved: https://github.com/facebook/yoga/pull/1086

Test Plan: ./gradlew publishToMavenLocal -PRELEASE_SIGNING_ENABLED=false

Reviewed By: mweststrate

Differential Revision: D28604529

Pulled By: passy

fbshipit-source-id: 2c35b94ce0e254bc7a8bc80e449ac5dadb5def38

android/build.gradle

@@ -26,3 +26,11 @@ android {
 dependencies {
     api project(':yoga')
 }
+
+// We don't build Javadoc at this time as we can't disable "BUCK" files
+// from mistakenly getting parsed as Java.
+tasks.withType(Javadoc).all {
+  enabled = false
+}
+
+apply plugin: 'com.vanniktech.maven.publish'