util/crossgcc: Retry package downloads on failure

For whatever reason, I've had buildgcc fail to download packages a
number of times.  Adding 2 additional retries before failing helps
with that problem.

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I060eaa5a0da955436169e2199c1c62044dcfd5ea
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47338
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

util/crossgcc/buildgcc

@@ -1057,7 +1057,7 @@ if searchtool wget "GNU" nofail > /dev/null; then
 	download_showing_percentage() {
 		url=$1
 		printf "... ${red}  0%%"
-		wget "$url" 2>&1 | while read -r line; do
+		wget --tries=3 "$url" 2>&1 | while read -r line; do
 			echo "$line" | grep -o "[0-9]\+%" | awk '{printf("\b\b\b\b%4s", $1)}'
 		done
 		printf "${NC}... "
@@ -1066,7 +1066,7 @@ elif searchtool curl "^curl " > /dev/null; then
 	download_showing_percentage() {
 		url=$1
 		echo
-		curl -#OL "$url"
+		curl --progress-bar --location --retry 3 "$url"
 	}
 fi