Add `po' directory skeleton.

po/POTFILES.in

@@ -0,0 +1,22 @@
+LR0.c
+allocate.c
+closure.c
+conflicts.c
+derives.c
+# files.c
+getargs.c
+# gram.c
+lalr.c
+lex.c
+main.c
+nullable.c
+output.c
+print.c
+reader.c
+reduce.c
+# symtab.c
+# warshall.c
+version.c
+
+getopt.c
+getopt1.c