Fix misspellings in sysdeps/unix -- BZ 25337

Applying this commit results in bit-identical rebuild of
libc.so.6 math/libm.so.6 elf/ld-linux-x86-64.so.2 mathvec/libmvec.so.1

Reviewed-by: Florian Weimer <fweimer@redhat.com>

sysdeps/unix/sysv/linux/netlink_assert_response.c

@@ -83,7 +83,7 @@ __netlink_assert_response (int fd, ssize_t result)
           __libc_fatal (message);
         }
       else
-        /* Restore orignal errno value.  */
+        /* Restore original errno value.  */
         __set_errno (error_code);
     }
   else if (result < sizeof (struct nlmsghdr))