change simd_sll into simd_vsll, simd_srl into simd_vsrl, simd_sra into simd_vsra
Merge branch 'master' of https://github.com/Logicalmars/SIMD-libgen

Conflicts:
	Library_Generator/StrategyPool.py
	Library_Tester/playground.cpp
	Library_Tester/utility.h