Compile the default mke2fs.conf into mke2fs program

Compile the default mke2fs.conf into mke2fs program

People are getting surprised by mke2fs creating filesystems with
different defaults than earlier versions of mke2fs if mke2fs.conf is
not present.  Having gotten two complaints about ramdisks getting
created by with 4k blocksizes which then blow up when the ramdisk is
mounted with a "Magic mismatch, very weird" error message from the
kernel, let's fix this by making sure mke2fs has a built-in version of
mke2fs.conf file.  People can still override the built-in version of
mke2fs.conf by editing /etc/mke2fs.conf, but this maintains the
previous behavior.

Addresses-Sourceforge-Bug: #1745818

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