sha/asm/sha256-armv4.pl: fix compile issue in kernel and eliminate little-endian dependency.

(Imported from upstream's 51f8d095562f36cdaa6893597b5c609e943b0565.)

I don't see why we'd care, but just to minimize divergence.

Change-Id: I4b07e72c88fcb04654ad28d8fd371e13d59a61b5
Reviewed-on: https://boringssl-review.googlesource.com/4466
Reviewed-by: Adam Langley <agl@google.com>
1 file changed