Merge pull request #21 from navarasu/fix_17

#17 Fixed issue in remove directory

Author: navarasu

lib/bundle.js

@@ -27,7 +27,7 @@ function cleanBuild(){
   this.cli.log("Cleaning ruby layer build")
   this.ruby_layer = path.join(this.servicePath,'.serverless','ruby_layer')
   if (fs.pathExistsSync(this.ruby_layer)){
-    fs.rmdirSync(this.ruby_layer,  { recursive: true }) 
+    fs.removeSync(this.ruby_layer)
   }
 }
 function bundleInstall(){
@@ -120,7 +120,7 @@ function addFiletoZip(zip, dir_path, file_name){
 
 function zipBundleFolder() {
   this.gem_folder= fs.readdirSync(path.join(this.build_path,'ruby'))[0]
-  fs.rmdirSync(path.join(this.build_path,'ruby',this.gem_folder,'cache'),{ recursive: true })
+  fs.removeSync(path.join(this.build_path,'ruby',this.gem_folder,'cache'))
   const platform = process.platform == 'win32' ? 'DOS' : 'UNIX'
   return zipDir(this.build_path,
                 path.join(this.ruby_layer, 'gemLayer.zip'),