Fix up problems when compiling in a directory other than the source
directory.
diff --git a/configure.in b/configure.in
index b05ce4b..aeb3223 100644
--- a/configure.in
+++ b/configure.in
@@ -1167,6 +1167,7 @@
 AC_OUTPUT(Makefile \
  Objects/Makefile \
  Parser/Makefile \
+ Grammar/Makefile \
  Python/Makefile \
  Modules/Makefile.pre \
  Modules/Setup.config)