linux-user: Fix sparc32plus stat64 syscalls.

Check TARGET_ABI_BITS, not TARGET_LONG_BITS, when deciding
whether or not the guest needs special 64-bit stat translation.
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

linux-user/syscall.c

@@ -4021,7 +4021,7 @@ static inline abi_long host_to_target_stat64(void *cpu_env,
     } else
 #endif
     {
-#if (TARGET_LONG_BITS == 64) && (!defined(TARGET_ALPHA))
+#if TARGET_ABI_BITS == 64 && !defined(TARGET_ALPHA)
         struct target_stat *target_st;
 #else
         struct target_stat64 *target_st;