UPSTREAM: crypto: mips: add poly1305-core.S to .gitignore

poly1305-core.S is an auto-generated file, so it should be ignored.

Bug: 254441685
Fixes: a11d055e7a64 ("crypto: mips/poly1305 - incorporate OpenSSL/CRYPTOGAMS optimized implementation")
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
(cherry picked from commit dc92d0df51dc61de88bf6f4884a17bf73d5c6326)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I511083af6f67d1c2d88bb5d2c749478383de0c70