Update handling of e_flags according to the documentation update [1] (discussions [2][3]). Object file bitness is now represented in the EI_CLASS byte. The e_flags field is now interpreted as follows: e_flags[2:0]: Base ABI modifier - 0x1: soft-float - 0x2: single-precision hard-float - 0x3: double-precision hard-float e_flags[7:6]: ELF object ABI version - 0x0: v0 - 0x1: v1 [1]: https://github.com/loongson/LoongArch-Documentation/blob/main/docs/LoongArch-ELF-ABI-EN.adoc#e_flags-identifies-abi-type-and-version [2]: https://github.com/loongson/LoongArch-Documentation/pull/61 [3]: https://github.com/loongson/LoongArch-Documentation/pull/47
