Fix the Hindi locale file

[nexdrew]

Otherwise y18n will blow up when attempting to lookup the singular/plural version of the localized string:

require('yargs')
  .option('f', {
    alias: 'foo',
    desc: 'foo for thought',
    requiresArg: true
  })
  .option('b', {
    alias: 'bar',
    desc: 'a dog and a cat walk into a bar...',
    requiresArg: true
  })
  .argv

Before this fix:

$ LANG=hi_IN.UTF-8 node locales.js -f -b
विकल्प:
  -f, --foo  foo for thought
  -b, --bar  a dog and a cat walk into a bar...

Cannot read property 'indexOf' of undefined

After this fix:

$ LANG=hi_IN.UTF-8 node locales.js -f -b
विकल्प:
  -f, --foo  foo for thought
  -b, --bar  a dog and a cat walk into a bar...

कुछ तर्को के मूल्य गुम हैं: f, b

Also took the opportunity to make the id locale consistent with others in terms of where each localized string is defined in the json file.