Bug 1053788: Factor out LMinMax from LMinMax{I,F}; r=sunfish
Bug 1053788: Implement backends for generating min/max for float32; r=sunfish
Bug 1053788: Add float32 tests for RMinMax; r=nbp
Bug 1053788: Activate float32 specialization of min/max; r=nbp
Bug 1053788: Add Float32 min max in asm.js; r=luke