make "make clean" remove all build results

Makefile

diff --git a/Makefile b/Makefile
index c88b9e1..611bd7d 100644
--- a/Makefile
+++ b/Makefile
@@ -1737,7 +1737,7 @@
 	rm -f tools/gdb/astest tools/gdb/gdbcont tools/gdb/gdbsend
 	rm -f tools/env/fw_printenv tools/env/fw_setenv
 	rm -f board/cray/L1/bootscript.c board/cray/L1/bootscript.image
-	rm -f board/trab/trab_fkt
+	rm -f board/trab/trab_fkt board/voiceblue/eeprom
 
 clobber:	clean
 	find . -type f \( -name .depend \