make makefiles in samples behave the same as the others

samples/lynx/Makefile

@@ -35,6 +35,14 @@ else
   LD := $(if $(wildcard ../../bin/ld65*),../../bin/ld65,ld65)
 endif
 
+ifeq ($(SILENT),s)
+    QUIET = 1
+endif
+
+ifdef QUIET
+    .SILENT:
+endif
+
 EXELIST_lynx = \
 	hello.lnx \
 	mandelbrot.lnx \
@@ -59,6 +67,7 @@ endif
 .SUFFIXES: .c .lnx
 
 %.lnx : %.c
+	$(if $(QUIET),echo $(SYS):$@)
 	$(CL) -t $(SYS) -Oris -m $*.map -o $@ $<
 
 clean: