Remove shebang and +x from frameworks test runner

Summary: It is not a valid assumption that '#!/usr/bin/env php' is HHVM. Force people to specify
refs facebook/hhvm#4341

Reviewed By: @JoelMarcey

Differential Revision: D1710053

Signature: t1:1710053:1417458141:29e3a4a3dee80f567e08f279d51b3adff163fa38
Make hphp/test/run work on PHP 5.3

Summary: Installed php-cli and php-process packages on Centos 6 (php 5.3.3)

  cd hphp/test
  /usr/bin/php ./run -m interp quick/ # PHP 5.3.3
  /usr/local/bin/php ./run -m interp quick/ # HHVM FB release

Fixes facebook/hhvm#4341
@ptarjan is adding this to our automated testing.

Reviewed By: @ptarjan

Differential Revision: D1710792

Signature: t1:1710792:1417477188:6f85959db45ac58c98884e66dedf62dcf62b71bc