Update gettext files to version 0.19.8

This also removes the built-in "intl" directory as this is now
considered deprecated by the gettext package.  This means that we
won't try to use an internal version of gettext if it's not installed
on the build system.  We will simply disable NLS support in that case.

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