Fix e2fsprogs-libs build failure due to 'subs' target

In e2fsprogs-libs the lib/ext2fs directory is not present, and we need
to make sure the top-level Makefile doesn't blow up in it's not there.

Addresses-Sourceforge-Bug: #2087502

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