Detect changes to PBXFrameworksBuildPhase during target build up-to-date checking

[lacasseio]

As a user building Xcode targets using Gradle, I want the Gradle tasks representing the Xcode targets using PBXFrameworksBuildPhase to be out-of-date when its build specification change during an incremental build so I can have accurate feedback.

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1. Detect changes to PBXBuildFile during build up-to-date checking #788
   a:enhancement in:xcode-build-adapter +2

Acceptance Criteria

• Changes to the build phase name don't cause the task to be out-of-date. The name of a build phase is only an organizational tool and does not impact the build itself. (Cannot change build phase name via IDE)
• Any changes to files, e.g. adding new items or removing existing items. Ordering change should have no effect. (We decided against ignoring ordering)
• Any change to the content of the files/directories represented by files.