reflect: test method calls on pointers to pointers

Gccgo got this wrong, and evidently nothing else tests it.

R=golang-dev, r
CC=golang-dev
https://codereview.appspot.com/13709045
encoding/xml: remove dead code

Avoid future 'declared and not used error'.
See also issue 6414.

R=r
CC=golang-dev
https://codereview.appspot.com/13242058
test: avoid future 'declared and not used' error

See also issue 6414.

R=r
CC=golang-dev
https://codereview.appspot.com/13683044