Build system: Enable V=1 to disable @'s

This patch is autogenerated, with:
  git-ls-files | grep Makefile | xargs perl -i~ -pe 's/^\t\@/\t\$Q /'

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

examples/q2w/Makefile

@@ -46,37 +46,37 @@ BINS	=	$(SRC:.c=)
 all:	$(BINS)
 
 blink:	blink.o
-	@echo [link]
-	@$(CC) -o $@ blink.o $(LDFLAGS) $(LDLIBS)
+	$Q echo [link]
+	$Q $(CC) -o $@ blink.o $(LDFLAGS) $(LDLIBS)
 
 blink-io:	blink-io.o
-	@echo [link]
-	@$(CC) -o $@ blink-io.o $(LDFLAGS) $(LDLIBS)
+	$Q echo [link]
+	$Q $(CC) -o $@ blink-io.o $(LDFLAGS) $(LDLIBS)
 
 button:	button.o
-	@echo [link]
-	@$(CC) -o $@ button.o $(LDFLAGS) $(LDLIBS)
+	$Q echo [link]
+	$Q $(CC) -o $@ button.o $(LDFLAGS) $(LDLIBS)
 
 volts:	volts.o
-	@echo [link]
-	@$(CC) -o $@ volts.o $(LDFLAGS) $(LDLIBS)
+	$Q echo [link]
+	$Q $(CC) -o $@ volts.o $(LDFLAGS) $(LDLIBS)
 
 bright:	bright.o
-	@echo [link]
-	@$(CC) -o $@ bright.o $(LDFLAGS) $(LDLIBS)
+	$Q echo [link]
+	$Q $(CC) -o $@ bright.o $(LDFLAGS) $(LDLIBS)
 
 
 .c.o:
-	@echo [CC] $<
-	@$(CC) -c $(CFLAGS) $< -o $@
+	$Q echo [CC] $<
+	$Q $(CC) -c $(CFLAGS) $< -o $@
 
 clean:
-	@echo "[Clean]"
-	@rm -f $(OBJ) *~ core tags $(BINS)
+	$Q echo "[Clean]"
+	$Q rm -f $(OBJ) *~ core tags $(BINS)
 
 tags:	$(SRC)
-	@echo [ctags]
-	@ctags $(SRC)
+	$Q echo [ctags]
+	$Q ctags $(SRC)
 
 depend:
 	makedepend -Y $(SRC)