Mobile Theme: Update the theme tags

On style.css by change width terms to layout as per http://core.trac.wordpress.org/changeset/26711
Props @lancewillett

modules/minileven/theme/pub/minileven/style.css

@@ -7,7 +7,7 @@ Description: The Minileven theme is a clean, lightweight mobile experience for y
 Version: 2.0-wpcom
 License: GNU General Public License
 License URI: license.txt
-Tags: dark, light, white, black, gray, one-column, flexible-width, responsive-width, custom-background, custom-header, custom-menu, full-width-template, infinite-scroll, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready, blog, bright, clean, contemporary, elegant, minimal, modern, photography, simple, tumblelog
+Tags: dark, light, white, black, gray, one-column, fluid-layout, responsive-layout, custom-background, custom-header, custom-menu, full-width-template, infinite-scroll, microformats, post-formats, rtl-language-support, sticky-post, theme-options, translation-ready, blog, bright, clean, contemporary, elegant, minimal, modern, photography, simple, tumblelog
 */
 
 .image-attachment .entry-caption p {