From upstream commit fixing aarch64 build failure

The sha1_process_block64_shaNI function is x86-specific and needs
architecture guards to prevent undeclared function errors on ARM64
and other non-x86 platforms.

This fixes the compile error: 'sha1_process_block64_shaNI' undeclared
(first use in this function)

Reference: https://lists.busybox.net/pipermail/busybox/2024-September/090943.html
Upstream patch: https://www.mail-archive.com/busybox@busybox.net/msg29511.html

--- a/libbb/hash_md5_sha.c
+++ b/libbb/hash_md5_sha.c
@@ -1313,7 +1313,9 @@ unsigned FAST_FUNC sha1_end(sha1_ctx_t *ctx, void *resbuf)
 	hash_size = 8;
 	if (ctx->process_block == sha1_process_block64
 #if ENABLE_SHA1_HWACCEL
+# if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 	 || ctx->process_block == sha1_process_block64_shaNI
+# endif
 #endif
 	) {
 		hash_size = 5;