buildgcc: printf no-color before quiting

On some kind of terms (shell in emacs), the color-ctrl
letters don't work. The backspaces can not delete
correct number of letters. So we don't print color-ctrl
letters in loop.

Change-Id: I1f1729095e8968a9344ed9f1f278f7c78f7110e9
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/16066
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

util/crossgcc/buildgcc

@@ -219,10 +219,9 @@ download_showing_percentage() {
 	url=$1
 	printf " ..${red}  0%%"
 	wget --no-check-certificate $url 2>&1 | while read line; do
-		printf "${red}"
 		echo $line | grep -o "[0-9]\+%" | awk '{printf("\b\b\b\b%4s", $1)}'
-		printf "${NC}"
 	done
+	printf "${NC}"
 }
 
 download() {
@@ -351,6 +350,12 @@ build()
 	fi
 }
 
+quit()
+{
+	printf "${NC}Stop\n"
+	exit 1
+}
+
 cleanup()
 {
 	if [ $SAVETEMPS -ne 0 ]; then
@@ -673,6 +678,8 @@ print_stable() {
 	esac
 }
 
+trap quit 1 2 3 15
+
 # Look if we have getopt. If not, build it.
 export PATH=$PATH:.
 getopt - > /dev/null 2>/dev/null || gcc -o getopt getopt.c