crypto: x86/poly1305 - fix .gitignore typo

Admist the kbuild robot induced changes, the .gitignore file for the
generated file wasn't updated with the non-clashing filename. This
commit adjusts that.

Signed-off-by: Jason A. Donenfeld <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>

Author: zx2c4

arch/x86/crypto/.gitignore

@@ -1 +1 @@
-poly1305-x86_64.S
+poly1305-x86_64-cryptogams.S