[NFC] Fix Windows builds that use MSVC 14.x

[jurahul]

Summary

• Use explicit type for the replaceDims and replaceSymbols lambda to fix build failues with MSVC 14.x

mlir/lib/IR/AffineMap.cpp

static_assert(llvm::is_one_of<AffineDimOrSymExpr, AffineDimExpr,
                 "expected AffineDimExpr or AffineSymbolExpr");
 
   constexpr bool isDim = std::is_same<AffineDimOrSymExpr, AffineDimExpr>::value;
   int64_t numDimOrSym = (isDim) ? map.getNumDims() : map.getNumSymbols();
   SmallVector<AffineExpr> replacements;
   replacements.reserve(numDimOrSym);
 
   auto createNewDimOrSym = (isDim) ? getAffineDimExpr : getAffineSymbolExpr;
-  auto replaceDims = [](AffineExpr e, ArrayRef<AffineExpr> replacements) {
+
+  using replace_fn_ty =
+      std::function<AffineExpr(AffineExpr, ArrayRef<AffineExpr>)>;
+  replace_fn_ty replaceDims = [](AffineExpr e,
+                                 ArrayRef<AffineExpr> replacements) {
     return e.replaceDims(replacements);
   };
-  auto replaceSymbols = [](AffineExpr e, ArrayRef<AffineExpr> replacements) {
+  replace_fn_ty replaceSymbols = [](AffineExpr e,
+                                    ArrayRef<AffineExpr> replacements) {
     return e.replaceSymbols(replacements);
   };
-  auto replaceNewDimOrSym = (isDim) ? replaceDims : replaceSymbols;
+  replace_fn_ty replaceNewDimOrSym = (isDim) ? replaceDims : replaceSymbols;
 
   MLIRContext *context = map.getContext();
   int64_t newNumDimOrSym = 0;
   for (unsigned dimOrSym = 0; dimOrSym < numDimOrSym; ++dimOrSym) {
     if (toProject.test(dimOrSym)) {
       replacements.push_back(getAffineConstantExpr(0, context));
       continue;
     }