refactor(gulpfile): correct preboot paths
refactor(gulpfile): correct preboot paths

jeffwhelpley/universal,fredericksilva/universal,angular/universal,ufo-github/universal,ufo-github/universal,dbabaioff/universal,ufo-github/universal,fredericksilva/universal,angular/universal,manekinekko/universal,angular/universal,dbabaioff/universal,dbabaioff/universal,jeffwhelpley/universal,fredericksilva/universal,angular/universal,manekinekko/universal