Ignore config.h, config.h.in, stamp-h and stamp-h.in.

.cvsignore

@@ -3,6 +3,10 @@ Makefile.in
 aclocal.m4
 confdefs.h
 config.cache
+config.h
+config.h.in
 config.log
 config.status
 configure
+stamp-h
+stamp-h.in