gcc: 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/gcc/gcc-uclibc-4.x.mk

@@ -211,7 +211,7 @@ endif
 
 $(DL_DIR)/$(GCC_SOURCE):
 	mkdir -p $(DL_DIR)
-	$(call MESSAGE,"Downloading gcc")
+	$(Q)$(call MESSAGE,"Downloading gcc")
 	$(call DOWNLOAD,$(GCC_SITE)/$(GCC_SOURCE))
 
 gcc-unpacked: $(GCC_DIR)/.patched