Revert "Fix techmap's -D option (passed to read_verilog)"

This reverts commit 6212ac13841ba0389ceddf18afb024a1826f9373.
Revert "For the stat command, always print out regardless"

This reverts commit 8b1b3805aa04b1590bc45607be825d3426f958d5.
For some reason, we may get a LUT with an empty mask

This ensures that BLIF file is still legal
Compile at -O3