Set LSR complexity limit back to the LLVM default
Set LSR complexity limit back to the LLVM default

Reduces compile time of app of interest from 4.5 minutes to
less than 10 seconds.

Note:
  - The llvm default for LSR complexity is UINT16_MAX
  - When compiling for Hexagon, this is changed to UINT16_MAX*10
  - The exact setting of this limit could be increased if
    performance is not sufficient with the llvm default setting

kgnk/Halide,psuriana/Halide,kgnk/Halide,jiawen/Halide,psuriana/Halide,jiawen/Halide,psuriana/Halide,ronen/Halide,psuriana/Halide,kgnk/Halide,ronen/Halide,psuriana/Halide,kgnk/Halide,ronen/Halide,jiawen/Halide,jiawen/Halide,ronen/Halide,jiawen/Halide,ronen/Halide,psuriana/Halide,kgnk/Halide,psuriana/Halide,ronen/Halide,kgnk/Halide,ronen/Halide,jiawen/Halide,jiawen/Halide,kgnk/Halide,kgnk/Halide,ronen/Halide