DEVELOPERS: add myself for php

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 2a64a85515f5d191c3f5833e331905ab23129a2b)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -429,6 +429,7 @@ F:	package/perl-timedate/
 F:	package/perl-uri/
 F:	package/perl-www-robotrules/
 F:	package/pixman/
+F:	package/php/
 F:	package/pngquant/
 F:	package/pound/
 F:	package/pulseaudio/