Alex Hoppen d6bcfd915a [CMake] Fix issues when running build-tooling-libs ...

There were three different issues going on here, all of these were triggered by https://github.com/apple/swift/pull/61618 which stared including `AST/AnyFunctionRef.h` from the ASTBridging modulemap

- We did not find the clang include dirs because the unified build that build-tooling-libs is using does not import ClangConfig, setting `CLANG_INCLUDE_DIRS` in `swift_common_unified_build_config` fixed this problem.
- Some of the headers in `swift-ast-generated-headers` import generated headers from clang that might not have been created yet. Making `swift-ast-generated-headers` depend on the clang generated headers fixes this problem. This just lowers the dependency because `swiftAST` depends on `swift-ast-generated-headers`
- If a Swift compiler from Xcode is used, the SwiftShims don’t live next to the compiler but in the SDK. Adding the SDKs lib to the include paths fixes this problem

2022-10-22 12:35:17 +02:00

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