[RISCV] Set __GCC_CONSTRUCTIVE_SIZE/__GCC_DESTRUCTIVE_SIZE to 64 for riscv64#162986

wangpc-pp wants to merge 2 commits intollvm:mainllvm/llvm-project:mainfrom

wangpc-pp:main-riscv-hardwareInterferenceSizeswangpc-pp/llvm-project:main-riscv-hardwareInterferenceSizesCopy head branch name to clipboard