test: run some more tests by default

R=golang-dev, remyoudompheng, iant, rsc
CC=golang-dev
https://golang.org/cl/6833043

test/args.go

-// $G $F.go && $L $F.$A && ./$A.out arg1 arg2
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// run arg1 arg2
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/nul1.go

-// [ "$GORUN" == "" ] || exit 0  # Android runner gets confused by the NUL output 
-// $G $D/$F.go && $L $F.$A && ./$A.out >tmp.go &&
-// errchk $G -e tmp.go
-// rm -f tmp.go
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// errorcheckoutput
 
 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/run.go

@@ -676,10 +676,7 @@ func (t *test) wantedErrors(file, short string) (errs []wantedError) {
 }
 
 var skipOkay = map[string]bool{
-	"args.go":                 true,
-	"index.go":                true,
 	"linkx.go":                true,
-	"nul1.go":                 true,
 	"rotate.go":               true,
 	"sigchld.go":              true,
 	"sinit.go":                true,