TestFp and TestFP are same, remove one.

Change-Id: Iffdece634cd4572421974496298925e7c6ac13a9
Reviewed-on: https://go-review.googlesource.com/22799Reviewed-by: Minux Ma <minux@golang.org>
Run-TryBot: Minux Ma <minux@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>