Corrected Helpshift Podspec (supports `use_frameworks!`)

Helpshift-4.12.1.podspec.json

{
  "name": "Helpshift",
  "version": "4.12.1",
  "summary": "Customer service helpdesk for mobile applications.",
  "license": {
    "type": "Commercial",
    "text": "See http://www.helpshift.com/terms/"
  },
  "homepage": "http://www.helpshift.com/",
  "authors": {
    "Helpshift": "[email protected]"
  },
  "source": {
    "http": "https://d3e51fp79zp4el.cloudfront.net/library/ios/v4.12/helpshift-sdk-ios-v4.12.1.zip"
  },
  "platforms": {
    "ios": "6.0"
  },
  "source_files": "helpshift-sdk-ios-v4.12.1/Helpshift.h",
  "resources": [
    "helpshift-sdk-ios-v4.12.1/HSResources/*.png",
    "helpshift-sdk-ios-v4.12.1/HSLocalization/*.lproj"
  ],
  "preserve_paths": [
    "helpshift-sdk-ios-v4.12.1/libHelpshift.a",
    "helpshift-sdk-ios-v4.12.1/HSLocalization/*.lproj",
    "helpshift-sdk-ios-v4.12.1/HSThemes/*.plist"
  ],
  "frameworks": [
    "CoreGraphics",
    "QuartzCore",
    "CoreText",
    "SystemConfiguration",
    "CoreTelephony",
    "Foundation",
    "UIKit",
    "Security",
    "QuickLook"
  ],
  "libraries": [
    "sqlite3.0",
    "z"
  ],
  "vendored_libraries": "helpshift-sdk-ios-v4.12.1/libHelpshift.a",
  "xcconfig": {
    "LIBRARY_SEARCH_PATHS": "\"$(PODS_ROOT)/Helpshift/helpshift-sdk-ios-v4.12.1\""
  },
  "documentation_url": "http://developers.helpshift.com/ios/",
  "requires_arc": false
}