fix: BUILD_LIBRARY_FOR_DISTRIBUTION in Makefile

[akoeplinger]

📜 Description

The variable is called BUILD_LIBRARY_FOR_DISTRIBUTION (singular) not BUILD_LIBRARIES_FOR_DISTRIBUTION (plural):

• https://developer.apple.com/documentation/xcode/build-settings-reference#Build-Libraries-for-Distribution
• https://www.swift.org/blog/library-evolution/#enabling-library-evolution-support

💡 Motivation and Context

This seems to be a common typo that is unfortunately spread across various blog posts.

💚 How did you test it?

📝 Checklist

You have to check all boxes before merging:

• I reviewed the submitted code.
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[armcknight]

Thanks for the contribution @akoeplinger! That is indeed a very unfortunate typo being spread around, and an unfortunate naming discrepancy even in Xcode

[philipphofmann]

@armcknight, can we merge this? If yes, please smash that button 😄.