RISCV: [Codegen] Add VisitConstructorFence

Test: m test-art-host-gtest
Bug: 283082089
Signed-off-by: Lifang Xia <lifang_xia@linux.alibaba.com>
Signed-off-by: Wendong Wang <wangwd@xcvmbyte.com>
Change-Id: I99bf8301c275174a33ae6cf1d14b82967b87b3d6
1 file changed