Update to copy of current master Go testsuite.

gcc/testsuite/go.test/test/bench/shootout/timing.log

gcc/testsuite/go.test/test/blank.go

gcc/testsuite/go.test/test/blank1.go

gcc/testsuite/go.test/test/chan/doubleselect.go

gcc/testsuite/go.test/test/chan/select2.go

gcc/testsuite/go.test/test/deferfin.go

gcc/testsuite/go.test/test/divmod.go

gcc/testsuite/go.test/test/errchk

gcc/testsuite/go.test/test/escape2.go

gcc/testsuite/go.test/test/escape5.go

gcc/testsuite/go.test/test/fixedbugs/bug191.dir/a.go

gcc/testsuite/go.test/test/fixedbugs/bug191.dir/b.go

gcc/testsuite/go.test/test/fixedbugs/bug191.dir/main.go

gcc/testsuite/go.test/test/fixedbugs/bug295.go

gcc/testsuite/go.test/test/fixedbugs/bug385_64.go

gcc/testsuite/go.test/test/fixedbugs/bug435.go

gcc/testsuite/go.test/test/fixedbugs/bug460.dir/a.go

gcc/testsuite/go.test/test/fixedbugs/bug460.dir/b.go

gcc/testsuite/go.test/test/fixedbugs/bug475.go

gcc/testsuite/go.test/test/fixedbugs/bug476.go