Feat: Add support for sw_64 architecture

[Verney7]

Updated the configure script and test_lib.h to recognize and handle the sw_64 architecture, ensuring proper detection and reporting of compile-time flags for this platform.

In this commit, support for a new architecture sw_64 is added to RHash. sw_64 is a new RISC ISA in open source world. Though it is a rather new ISA, it has been added to openEuler and openAnolis port since 2020.

More information about sw_64 ISA:

$ uname -m
sw_64
$ gcc -E -dM - < /dev/null|grep __sw_64__
#define __sw_64__ 1
$ gcc -E -dM - < /dev/null|grep BYTE_ORDER
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__