Modify CMakeList to not report error on constructor shadowing

Author: Ryan4253

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.6)
 project(RaidZeroLib)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++20 -Wall -Wextra -Wshadow -Wnull-dereference -Wno-psabi -Wno-unused-function -pthread -g -O0 -fprofile-arcs -ftest-coverage -D THREADS_STD")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++20 -Wall -Wextra -Wshadow=local -Werror=shadow=local -Wnull-dereference -Wno-psabi -Wno-unused-function -pthread -g -O0 -fprofile-arcs -ftest-coverage -D THREADS_STD")
 
 enable_testing()