Remove getversion.c; get_version is now in backupfile.c.
Add basename.c since it's no longer replacible.
INCLUDES = -I.. -I$(srcdir) -I../intl
libfu_a_SOURCES = getdate.y posixtm.y getopt.c getopt1.c \
-argmatch.c backupfile.c dirname.c filemode.c \
-full-write.c getversion.c idcache.c \
+addext.c argmatch.c backupfile.c basename.c dirname.c filemode.c \
+full-write.c idcache.c \
isdir.c long-options.c makepath.c modechange.c path-concat.c \
safe-read.c save-cwd.c savedir.c stripslash.c userspec.c xgetcwd.c \
xmalloc.c xstrdup.c xstrtol.c xstrtoul.c yesno.c