build: Fix print without color

The original patch removed the printing completely, just remove the
color.

Fixes: eabc1ddc4541  ("build: Honour NO_COLOR in include/scan.mk")
Signed-off-by: Hauke Mehrtens <[email protected]>

include/scan.mk

@@ -25,7 +25,7 @@ ifeq ($(IS_TTY),1)
     endef
   else
     define progress
-	:;
+	printf "\r$(1)" >&2;
     endef
   endif
 else