misc/cgo/life: remove -lmsvcrt to fix windows/amd64 build

        I guess this is the problem as I can't reproduce the failure.

R=golang-dev, alex.brainman
CC=golang-dev
https://golang.org/cl/6465060

misc/cgo/life/life.go

@@ -6,7 +6,6 @@
 
 package life
 
-// #cgo windows LDFLAGS: -lmsvcrt
 // #include "life.h"
 import "C"