Apply whitespace linter to all gradle files

Summary: Run whitespace and license linters on gradle build files.

Reviewed By: zertosh

Differential Revision: D25687355

fbshipit-source-id: 44330daac7582fed6c05680bffc74e855a9b1dbc

react-native/react-native-flipper/android/build.gradle

@@ -138,7 +138,7 @@ afterEvaluate { project ->
     android.libraryVariants.all { variant ->
         def name = variant.name.capitalize()
         def javaCompileTask = variant.javaCompileProvider.get()
-        
+
         task "jar${name}"(type: Jar, dependsOn: javaCompileTask) {
             from javaCompileTask.destinationDir
         }