decomp: Support LZCOUNT & POPCOUNT ops #719

Job	Run time
ghidra-script-tests (22.04)	17m 13s
llvm-build-and-test (20, 22.04, Debug, OFF)	18m 57s
llvm-build-and-test (20, 22.04, Release, OFF)	18m 51s
	55m 1s

Provide feedback