gitignore: hide various files copied by the autogen.sh step.

These files seem to have appear ever since the recent gettext changes in
commit f663d26ab5.
In particular, the call to autoreconf seems to be creating these.

.gitignore

@@ -30,6 +30,7 @@
 /config.h
 /config.h.in
 /config.log
+/config.rpath
 /config.status
 /config.status.lineno
 /config.sub

po/.gitignore

@@ -1,9 +1,17 @@
 /*.gmo
 /*.mo
 /*.pot
+/boldquot.sed
+/en@boldquot.header
+/en@quot.header
+/insert-header.sin
+/quot.sed
+/remove-potcdate.sin
 /Makefile
 /Makefile.in
+/Makevars.template
 /POTFILES
+/Rules-quot
 /messages
 /missing
 /po2tbl.sed.in