Add the profile library code to e2fsck

Add the profile library code to e2fsck

The profile library was originally written by Theodore Ts'o in 1995
for use in the MIT Kerberos v5 library.  It has been
modified/enhanced/bug-fixed over time by other members of the MIT
Kerberos team.  This version was originally taken from the Kerberos
v5 distribution, version 1.4.2, and radically simplified for use in
e2fsprogs.  (Support for locking for multi-threaded operations,
being able to modify and update the configuration file
programmatically, and Mac/Windows portability have been removed.
It has been folded into a single C source file to make it easier to
fold into an application program.)

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