[Dev] Does gcc in openeuler support -mlfence-after-load=yes?

@jdkboy @Haijian.Zhang It's a feature introduced to migrate a security issue. openEuler 20.03 doesn't support it. Have we supported it in master branch or do we have plan to support it? See details in below link. https://www.phoronix.com/scan.php?page=news_item&px=GNU-Assembler-LVI-Option...