package: build multiple simultaneous plugin changes correctly

Something in the build script would eat the remaining stdin for the loop

travis.sh

@@ -44,10 +44,10 @@ fi
 PLUGIN_CHANGE=
 while read -r FI ; do
 	if [[ $FI =~ ^plugins/.*$ ]]; then
-		./build_plugin.sh "$FI"
+		./build_plugin.sh "$FI" < /dev/null
 		PLUGIN_CHANGE=true
 	elif [[ "$FI" == "runelite.version" ]]; then
-		./rebuild_all.sh
+		./rebuild_all.sh < /dev/null
 	fi
 done < <(git diff --name-only "$TRAVIS_COMMIT_RANGE")