git: use safecrlf = true

from git-config:

If true, makes Git check if converting CRLF is reversible when
end-of-line conversion is active. Git will verify if a command
modifies a file in the work tree either directly or indirectly. For
example, committing a file followed by checking out the same file
should yield the original file in the work tree. If this is not the
case for the current setting of core.autocrlf, Git will reject the
file. The variable can be set to "warn", in which case Git will only
warn about an irreversible conversion but continue the operation.

CRLF conversion bears a slight chance of corrupting data. When it is
enabled, Git will convert CRLF to LF during commit and LF to CRLF
during checkout. A file that contains a mixture of LF and CRLF before
the commit cannot be recreated by Git. For text files this is the
right thing to do: it corrects line endings such that we have only LF
line endings in the repository. But for binary files that are
accidentally classified as text the conversion can corrupt data.

this has worked for me when converting gnome-shell-extensions and bind from scratch

Fixes #167

packit / dist-git-to-source-git

git: use safecrlf = true #171