gocr: fix whitespace in DATA patch

Previous commit 9de9f8d10e8e6d8c2d7cf7b74e6085038fc728d9 removed
trailing whitespace from a line in the DATA patch, making the patch
fail. This commit reinstates the whitespace so the patch succeeds and
the `--with-lib` option works again.
gocr: add 0.50 bottle.