kernel-headers: add missing $(Q)

Add a missing $(Q) in front of a MESSAGE call, which leads to the
message being displayed but also the command that shows the message.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

toolchain/kernel-headers/kernel-headers.mk

@@ -70,7 +70,7 @@ $(DL_DIR)/$(LINUX_HEADERS_SOURCE):
 ifeq ($(BR2_KERNEL_HEADERS_SNAP),y)
 	$(error No local $@ found, cannot continue. Are you sure you wanted to enable BR2_KERNEL_HEADERS_SNAP?)
 endif
-	$(call MESSAGE,"Downloading kernel headers")
+	$(Q)$(call MESSAGE,"Downloading kernel headers")
 	$(call DOWNLOAD,$(LINUX_HEADERS_SITE)/$(LINUX_HEADERS_SOURCE))
 
 kernel-headers: $(LINUX_HEADERS_DIR)/.configured