Fix gradle directory error

Summary:
Without this, running clean as part of a longer build
chain will fail because it tries to write to a directory
which got removed in a previous step.

Reviewed By: jknoxville

Differential Revision: D15197982

fbshipit-source-id: 296f5a30661a6e2138c0e37f0103f1b6a82bcfc9

android/third-party/native.gradle

@@ -224,7 +224,7 @@ task prepareRSocket(dependsOn: [downloadRSocket], type: Copy) {
     into "$externalDir/RSocket"
 }
 
-task writeCacheRevision() {
+task writeCacheRevision(dependsOn: createNativeDepsDirectories) {
     doLast {
         revisionFile.text = CACHE_REVISION.toString()
     }