[Mlir-commits] [mlir] [MLIR][BUG] fix {$VARIABLE} usage in CMakeLists.txt (PR #156183)

[Matthias Springer]

https://github.com/matthias-springer approved this pull request.

Not a CMake expert, but the vast majority of files use `${MLIR_MAIN_INCLUDE_DIR}` and syntax highlighting now properly highlights the file.

https://github.com/llvm/llvm-project/pull/156183