Add page title and header title to build page.

app/views/projects/builds/_header_title.html.haml

+- header_title project_title(@project, "Builds", project_builds_path(@project))

app/views/projects/builds/index.html.haml

 - page_title "Builds"
-- header_title project_title(@project, "Builds", project_builds_path(@project))
+= render "header_title"
 .project-issuable-filter
   .controls

app/views/projects/builds/show.html.haml

+- page_title "#{@build.name} (#{@build.id})", "Builds"
+= render "header_title"
+
 .build-page
   .gray-content-block
     Build for commit