Merge pull request #2629 from enkore/f/gitignore

update .gitignore

.gitignore

@@ -9,7 +9,7 @@ src/borg/crypto/low_level.c
 src/borg/hashindex.c
 src/borg/item.c
 src/borg/algorithms/chunker.c
-src/borg/algorithms/crc32.c
+src/borg/algorithms/checksums.c
 src/borg/platform/darwin.c
 src/borg/platform/freebsd.c
 src/borg/platform/linux.c