runtime: convert .s textflags from numbers to symbolic constants.
Remove NOPROF/DUPOK from everything.
Edits done with a script, except pclinetest.asm which depended
on the DUPOK flag on main().
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12613044
diff --git a/src/pkg/runtime/rt0_plan9_386.s b/src/pkg/runtime/rt0_plan9_386.s
index 2745d5d..dad75c8 100644
--- a/src/pkg/runtime/rt0_plan9_386.s
+++ b/src/pkg/runtime/rt0_plan9_386.s
@@ -2,7 +2,9 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-TEXT _rt0_386_plan9(SB),7, $0
+#include "../../cmd/ld/textflag.h"
+
+TEXT _rt0_386_plan9(SB),NOSPLIT, $0
MOVL AX, _tos(SB)
// move arguments down to make room for
