cbfstool: Add .SILENT: to Makefile

This makes the make process look like the one inside
of coreboot's build system.

Change-Id: I48be2df39cad47644e16ce583b27c33a1da81fc3
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/12509
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/util/cbfstool/Makefile b/util/cbfstool/Makefile
index 64db0b3..085a19a 100644
--- a/util/cbfstool/Makefile
+++ b/util/cbfstool/Makefile
@@ -17,4 +17,6 @@
 	$(RM) $(objutil)/cbfstool/fmaptool $(fmapobj)
 	$(RM) $(objutil)/cbfstool/rmodtool $(rmodobj)
 
+.SILENT:
+
 include Makefile.inc