cmake MI_HAS_VALGRINDH examples

AXErunners/axe src/dashbls/depends/mimalloc/CMakeLists.txt :131 

CHECK_INCLUDE_FILES("valgrind/valgrind.h;valgrind/memcheck.h" MI_HAS_VALGRINDH)

CppCXY/EmmyLuaCodeStyle 3rd/mimalloc-2.0.9/CMakeLists.txt :132 

CHECK_INCLUDE_FILES("valgrind/valgrind.h;valgrind/memcheck.h" MI_HAS_VALGRINDH)