[mlir] Fix missing import (#150330)

building this file would fail when
MLIR_ENABLE_EXPENSIVE_PATTERN_API_CHECKS = 1

Signed-off-by: dan <[email protected]>

Author: dan-garvey

mlir/lib/Transforms/Utils/GreedyPatternRewriteDriver.cpp

@@ -22,6 +22,7 @@
 #include "mlir/Transforms/RegionUtils.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/ScopeExit.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ScopedPrinter.h"
 #include "llvm/Support/raw_ostream.h"