Support `apple_static_framework_import`

[brentleyjones]

https://github.com/bazelbuild/rules_apple/blob/master/doc/rules-apple.md#apple_static_framework_import

• Add an apple_static_framework_import example #211
• Support alwayslink: Add support for alwayslink #608
• Support deps
• Support sdk_dylibs: Add support for sdk_dylibs #372
• Support sdk_frameworks : Set -framework and -weak_framework for SDKs #278
• Support weak_sdk_frameworks : Set -framework and -weak_framework for SDKs #278