[rubygems/rubygems] Make sure platforms in spec lockfile are properly sorted

ruby/rubygems@99b4ac4548

Author: deivid-rodriguez

spec/bundler/install/gemfile/specific_platform_spec.rb

@@ -330,8 +330,7 @@
         specs:
 
       PLATFORMS
-        java
-        #{lockfile_platforms}
+        #{lockfile_platforms("java")}
 
       DEPENDENCIES
         pg_array_parser!