Upgrade Socket to CPAN version 2.008

2012/12/27
2.008   CHANGES:
         * Fix uninitialised memory read (RT82119)

2012/12/16
2.007   CHANGES:
         * Test %Config keys for definedness, not mere existence (RT79854)
         * Fix missing argument in sprintf in Socket.xs (from perl.git
           5d6dfea82e1c4b6, RT82007)