e2fsprogs: add large_file to base mkfs features

large_file (> 2G) support has been around since at least kernel 2.4;
mkfs of any sufficiently large filesystem sets it "accidentally"
when the resize inode exceeds 2G.  This leaves very small
filesystems lacking the feature, which potentially changes
their behavior & codepaths the first time a > 2G file gets
written.

There's really no reason to be making fresh filesystems which
strive to keep compatibility with 10 year old kernels; just
enable large_file at mkfs time.  This is particularly obvious
for ext4 fielsystems, which set huge_file by default, but not
necessarily large_file.

If old-kernel compatibility is desired, mke2fs.conf can be
modified locally to remove the feature.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>