cgi: don't depend on CGI.pm for tests
cgi: don't depend on CGI.pm for tests

CGI.pm used to be part of the Perl core,
but some distros now bundle perl-core
and perl-modules separately.

It's not worth depending on.

R=golang-dev, mattn.jp
CC=golang-dev
http://codereview.appspot.com/4675063

gnanderson/go,ssrl/go,apparentlymart/golang,gnanderson/go,dsriram/golang,ssrl/go,dsriram/golang,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,dsriram/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,ssrl/go,pombredanne/go-deleteme,ssrl/go,tv42/old-go,dsriram/golang,apparentlymart/golang,pombredanne/go-deleteme,tv42/old-go,gnanderson/go,ssrl/go,tv42/old-go,gnanderson/go,gnanderson/go,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,ssrl/go,ssrl/go,apparentlymart/golang,dsriram/golang,apparentlymart/golang,tv42/old-go,gnanderson/go,tv42/old-go,gnanderson/go,dsriram/golang,dsriram/golang