abuild: set -e fix for update_config_{sub,guess}

abuild.in

@@ -532,8 +532,7 @@ mkusers() {
 
 # helper to update config.sub to a recent version
 update_config_sub() {
-	local changed=false
-	find . -name config.sub | while read f; do
+	find . -name config.sub | (local changed=false; while read f; do
 		if ! ./$f armv6-alpine-linux-muslgnueabihf 2>/dev/null; then
 			msg "Updating $f"
 			cp "$datadir"/${f##*/} "$f" || return 1
@@ -541,16 +540,12 @@ update_config_sub() {
 		else
 			msg "No update needed for $f"
 		fi
-		# pipe subshell will return status of last command
-		$changed
-	done
-	return $?
+	done; $changed)
 }
 
 # helper to update config.guess to a recent version
 update_config_guess() {
-	local changed=false
-	find . -name config.guess | while read f; do
+	find . -name config.guess | (local changed=false; while read f; do
 		if grep -q aarch64 "$f" && grep -q ppc64le "$f"; then
 			msg "No update needed for $f"
 		else
@@ -558,10 +553,7 @@ update_config_guess() {
 			cp "$datadir"/${f##*/} "$f" || return 1
 			changed=true
 		fi
-		# pipe subshell will return status of last command
-		$changed
-	done
-	return $?
+	done; $changed)
 }
 
 runpart() {