Builds: sort list by branch ASC and time DESC

Previously, the list was sorted by SHA, which would cause the latest
version's download links to be displayed in an unpredictable order.

builds.php

@@ -17,7 +17,9 @@ public function __construct( Traversable $iterator, $callback ) {
 }
 
 /**
- * Retrieves the list of builds from the specified path
+ * Retrieves the list of builds from the specified path.
+ * List will be sorted by branch name ASC and time DESC, (using the zip file's
+ * timestamp as reference).
  * @param string $p_path
  * @param array $p_builds
  * @param SplFileInfo $p_logfile
@@ -76,11 +78,33 @@ function get_builds_list( $p_path, &$p_builds, &$p_logfile ) {
 			if( isset( $t_match[5] ) ) {
 				$p_builds[$t_sha][$t_ext]['digests'] = $t_file_url;
 			} else {
+				$t_time = $t_file->getMTime();
 				$p_builds[$t_sha][$t_ext]['file'] = $t_file_url;
-				$p_builds[$t_sha][$t_ext]['time'] = $t_file->getMTime();
+				$p_builds[$t_sha][$t_ext]['time'] = $t_time;
+
+				# Build reference time is the Zip file's timestamp
+				if( $t_ext == 'zip') {
+					$p_builds[$t_sha]['time'] = $t_time;
+				}
 			}
 		}
 	}
+
+	# Sort list by branch ASC, timestamp DESC
+	uasort( $p_builds, function( $a, $b ) {
+		$t_result = strcmp( $a['branch'], $b['branch'] );
+		if( $t_result == 0 ) {
+			if( $a['time'] == $b['time'] ) {
+				$t_result = 0;
+			} elseif( $a['time'] > $b['time'] ) {
+				$t_result = -1;
+			} else {
+				$t_result = +1;
+			}
+		}
+		return $t_result;
+	});
+
 	return true;
 }