libext2fs: Convert ext2fs_bg_flag_test() to ext2fs_bg_flags_test()

After cleaning up ext2fs_bg_flag_set() and ext2fs_bg_flag_clear(),
we're left with ext2fs_bg_flag_test().  Convert it to
ext2fs_bg_flags_test().

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
10 files changed