contrib/credential: .gitignore libsecret build artifacts

The libsecret credential helper does not mark its build artifact as
ignored, so running "make" results in a dirty working tree.

Mark the "git-credential-libsecret" binary as ignored to avoid the above.

Co-authored-by: Jeff King <[email protected]>
Signed-off-by: Jeff King <[email protected]>
Signed-off-by: Taylor Blau <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: 2 people

contrib/credential/libsecret/.gitignore

@@ -0,0 +1 @@
+git-credential-libsecret