Updates most of the broken php urls

(Apologies for the PR noise from here: https://github.com/CHH/php-build/pull/206)

I was unable to find any url replacements for:

http://downloads.php.net/stas/php-5.4.10RC1.tar.bz2
http://downloads.php.net/stas/php-5.4.1RC1.tar.bz2
http://downloads.php.net/stas/php-5.4.1RC2.tar.bz2

For the curious, the script I used to do the replacements is here (requires some familiarity with Clojure): https://gist.github.com/dwwoelfel/8a6944191cbd659665a0