Makefile.am, fix dependency rules for bison generated files

which have been lost in commit
> Date:   Sun Jul 5 19:34:25 2015 +0200
>
>     polish bison/flex makefile rules

src/frontend/Makefile.am

@@ -198,5 +198,7 @@ AM_YFLAGS = -d
 
 MAINTAINERCLEANFILES = Makefile.in
 
+$(srcdir)/parse.c : parse-bison.c
+
 parse-bison.c : parse-bison.y
 	$(am__skipyacc) $(YACCCOMPILE) -o $@ $<

src/spicelib/parser/Makefile.am

@@ -67,6 +67,8 @@ libinp_la_SOURCES = \
 		sperror.c	\
 		inpxx.h
 
+$(srcdir)/inpptree.c : inpptree-parser.c
+
 inpptree-parser.c : inpptree-parser.y
 	$(am__skipyacc) $(YACCCOMPILE) -o $@ $<