swift

8e2589c5 - Propagate `--enable-tensorflow` from build-script to CMake. (#29982)

Propagate `--enable-tensorflow` from build-script to CMake. (#29982) Propagate `--enable-tensorflow` from build-script to CMake as `-DSWIFT_ENABLE_TENSORFLOW:BOOL=TRUE`. Partially unreverts https://github.com/apple/swift/commit/73ebd5b223d06c478fede6b7c6201a2769b41221. This is significant for lit tests, so that `test/lit.site.cfg.in` adds `tensorflow` as an available feature.