buildgcc: Show the archive URL

In case of downloading errors, the URL is handy for analyzing the cause.

Change-Id: I6874cdc3c881cfdd52c80f80323536c30723654b
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/10853
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <gaumless@gmail.com>

util/crossgcc/buildgcc

@@ -188,7 +188,7 @@ download() {
 			"$($CHECKSUM tarballs/$FILE 2>/dev/null | \
 				sed -e 's,.*\([0-9a-f]\{40\}\).*,\1,')" ) && \
 			printf "(cached)" || (
-		printf "(downloading)"
+		printf "(downloading from $archive)"
 		rm -f tarballs/$FILE
 		cd tarballs
 		wget --no-check-certificate -q $archive