libe2p, libext2fs: Update file copyright permission states to match COPYING

The top-level COPYING file states that the e2p and ext2fs libraries
are available under the LGPLv2.  The files were incorrectly labelled.
Alex Thomas/Luster has been consulted wrt to the ext3_extents.h file;
the rest of the files were primarily authored by Theodore Ts'o.

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