Merge branch 'jk/git-pm-bare-repo-fix'

In Git 2.39, Git.pm stopped working in a bare repository, which has
been corrected.

* jk/git-pm-bare-repo-fix:
  Git.pm: use "rev-parse --absolute-git-dir" rather than perl code
  Git.pm: fix bare repository search with Directory option

t/t9700/test.pl

@@ -147,6 +147,11 @@ close TEMPFILE3;
 unlink $tmpfile3;
 chdir($abs_repo_dir);
 
+# open alternate bare repo
+my $r4 = Git->repository(Directory => "$abs_repo_dir/bare.git");
+is($r4->command_oneline(qw(log --format=%s)), "bare commit",
+	"log of bare repo works");
+
 # unquoting paths
 is(Git::unquote_path('abc'), 'abc', 'unquote unquoted path');
 is(Git::unquote_path('"abc def"'), 'abc def', 'unquote simple quoted path');