xfs: Fix -Werror=dangling-pointer work-around for older GCC

GCC 11 and older do not have dangling-pointer, use cc-option to make it
work for all versions of GCC.

Fixes: 5509050b ("xfs: Work around GCC 12 -Werror=dangling-pointer for xfs_attr_remote.o")
Signed-off-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>