93ce8e1087
As of today, Android's libcxx is missing C++17's std::function's CTAD
added in e1eabcdfad. This leads to
InferIntRangeCommon.cpp to fail to compile. This commit makes the
template parameter of std::function in that function explicit, therefore
avoiding CTAD. While LLVM/MLIR's requirement is C++17, the rest of the
code builds fine so hopefully this is acceptable.