Change the installation directory of the readme.txt file
to match standard FHS conventions.

--- a/user/wp/Makefile.am
+++ b/user/wp/Makefile.am
@@ -9,10 +9,11 @@
 EXTRA_DIST = \
 	$(wp_DATA)
 
+doc_DATA = \
+	readme.txt
+
 wpdir = $(ABIWORD_DATADIR)
 wp_DATA = \
-	readme.txt \
-	readme.abw \
 	system.profile \
 	system.profile-am-ET \
 	system.profile-ar \