Reformat BUCK files to follow new buildifier format

Summary: buildifier was updated and now we sort loads!

Reviewed By: zertosh

Differential Revision: D9771824

fbshipit-source-id: 0001aa5f656d4aa40b3498d5bfd792a3d14e56e1

local-cli/templates/HelloWorld/android/app/_BUCK

@@ -8,23 +8,13 @@
 # - `buck install -r android/app` - compile, install and run application
 #
 
+load(":build_defs.bzl", "create_aar_targets", "create_jar_targets")
+
 lib_deps = []
 
-for jarfile in glob(['libs/*.jar']):
-  name = 'jars__' + jarfile[jarfile.rindex('/') + 1: jarfile.rindex('.jar')]
-  lib_deps.append(':' + name)
-  prebuilt_jar(
-    name = name,
-    binary_jar = jarfile,
-  )
+create_aar_targets(glob(["libs/*.aar"]))
 
-for aarfile in glob(['libs/*.aar']):
-  name = 'aars__' + aarfile[aarfile.rindex('/') + 1: aarfile.rindex('.aar')]
-  lib_deps.append(':' + name)
-  android_prebuilt_aar(
-    name = name,
-    aar = aarfile,
-  )
+create_jar_targets(glob(["libs/*.jar"]))
 
 android_library(
     name = "all-libs",

local-cli/templates/HelloWorld/android/app/build_defs.bzl

@@ -0,0 +1,19 @@
+"""Helper definitions to glob .aar and .jar targets"""
+
+def create_aar_targets(aarfiles):
+    for aarfile in aarfiles:
+        name = "aars__" + aarfile[aarfile.rindex("/") + 1:aarfile.rindex(".aar")]
+        lib_deps.append(":" + name)
+        android_prebuilt_aar(
+            name = name,
+            aar = aarfile,
+        )
+
+def create_jar_targets(jarfiles):
+    for jarfile in jarfiles:
+        name = "jars__" + jarfile[jarfile.rindex("/") + 1:jarfile.rindex(".jar")]
+        lib_deps.append(":" + name)
+        prebuilt_jar(
+            name = name,
+            binary_jar = jarfile,
+        )