package: add missing CLEANFILES

* examples: here.

examples/c++/calc++/local.mk

@@ -31,6 +31,7 @@ $(calcxx_sources_generated): %D%/parser.stamp
 	@test -f $@ || $(MAKE) $(AM_MAKEFLAGS) %D%/parser.stamp
 CLEANFILES +=					\
   $(calcxx_sources_generated)			\
+  %D%/parser.dot				\
   %D%/parser.output				\
   %D%/parser.stamp				\
   %D%/scanner.cc

examples/c++/local.mk

@@ -68,4 +68,6 @@ endif
 EXTRA_DIST += %D%/variant-11.test
 
 dist_cxx_DATA = %D%/README.md %D%/Makefile %D%/variant.yy %D%/variant-11.yy
-CLEANFILES += %D%/simple.output %D%/variant.output %D%/variant-11.output
+CLEANFILES +=                                                   \
+  %D%/simple.output %D%/variant.output %D%/variant-11.output    \
+  %D%/simple.hh %D%/variant.hh %D%/variant-11.hh