[jancy] force simple GC safe points if we compile with address sanitizer
[jancy] force simple GC safe points if we compile with address sanitizer

hitting GC guard page does not make address sanitizer happy. so just use
simple GC safe point call if we make a sanitized build

vovkos/jancy,vovkos/jancy,vovkos/jancy,vovkos/jancy,vovkos/jancy