Add author info for nbody-v2

Author: paultcochrane

categories/shootout/n-body.p6-v2.pl

@@ -4,7 +4,7 @@
 
 =TITLE Perform an N-body simulation of the Jovian planets
 
-=AUTHOR
+=AUTHOR Gerhard R
 
 L<http://benchmarksgame.alioth.debian.org/u32/performance.php?test=nbody>