Add basops to be ignored for USAN in BASOP CI

ignorefiles = sorted(set(non_ivas_files) - set(basop_files))

ignorefunctions = ["L_add_o", "L_add_co", "L_sub_o", "shl_o"]

with open("ubsan_ignorelist.txt", "w") as f:

    for cfile in ignorefiles:

        print(f"src:{cfile}", file=f)

    for fun in ignorefunctions:

        print(f"fun:*{fun}*", file=f)