[ticket/9556] Drop php closing tags, add trailing newline

Closing tags converted using Oleg's script.
remove-php-end-tags.py -a .

Trailing newlines added using the following where $ext is file extension.
find . -type f -name "*.$ext" -print | xargs printf "e %s\nw\n" | ed -s;

Extensions: php, css, html, js, xml.

PHPBB3-9556

build/build_diff.php

@@ -411,5 +411,3 @@ function run_command($command)
 	$result = trim(`$command`);
 	echo "\n- Command Run: " . $command . "\n";
 }
-
-?>