make makefiles in samples behave the same as the others

samples/sim65/Makefile

@@ -37,6 +37,14 @@ else
   LD := $(if $(wildcard ../../bin/ld65*),../../bin/ld65,ld65)
 endif
 
+ifeq ($(SILENT),s)
+    QUIET = 1
+endif
+
+ifdef QUIET
+    .SILENT:
+endif
+
 EXELIST_sim6502 = \
         cpumode_example.bin \
         timer_example.bin \
@@ -61,6 +69,7 @@ endif
 .SUFFIXES: .c .bin
 
 %.bin : %.c
+	$(if $(QUIET),echo $(SYS):$@)
 	$(CL) -t $(SYS) -Oris -m $*.map -o $@ $<
 
 clean: