Add support for sw_64 architecture

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.

Author: Verney7

configure

@@ -500,6 +500,7 @@ if test -z "$BUILD_TARGET"; then
           sh3|sh4|sh4a) HOST_ARCH=sh ;;
           s390) HOST_ARCH=s390 ;;
           s390x) HOST_ARCH=s390x ;;
+          sw_64) HOST_ARCH=sw_64 ;;
           *mips*) HOST_ARCH=mips ;;
           nios2) HOST_ARCH=nios2 ;;
           vax) HOST_ARCH=vax ;;

librhash/test_lib.h

@@ -123,6 +123,15 @@ char* compiler_flags = "Compile-time flags:"
 #ifdef sparc
 	" sparc"
 #endif
+#ifdef __sw_64
+	" __sw_64"
+#endif
+#ifdef __sw_64__
+	" __sw_64__"
+#endif
+#ifdef sw_64
+	" sw_64"
+#endif
 #ifdef _ARCH_PPC
 	" _ARCH_PPC"
 #endif