runtime/internal/sys: rename Wasm to WASM

This commit changes sys.Wasm to sys.WASM, as requested on
https://groups.google.com/forum/#!topic/golang-dev/VquDxlhjPkg

Change-Id: I30a208c34576a8bb49b9beb524203d71df8fdf1c
Reviewed-on: https://go-review.googlesource.com/118395Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/runtime/internal/sys/arch.go

@@ -15,5 +15,5 @@ const (
 	MIPS64
 	PPC64
 	S390X
-	Wasm
+	WASM
 )

src/runtime/internal/sys/arch_wasm.go

@@ -5,7 +5,7 @@
 package sys
 
 const (
-	ArchFamily          = Wasm
+	ArchFamily          = WASM
 	BigEndian           = false
 	CacheLineSize       = 64
 	DefaultPhysPageSize = 65536

src/runtime/stack.go

@@ -940,7 +940,7 @@ func newstack() {
 		throw("missing stack in newstack")
 	}
 	sp := gp.sched.sp
-	if sys.ArchFamily == sys.AMD64 || sys.ArchFamily == sys.I386 || sys.ArchFamily == sys.Wasm {
+	if sys.ArchFamily == sys.AMD64 || sys.ArchFamily == sys.I386 || sys.ArchFamily == sys.WASM {
 		// The call to morestack cost a word.
 		sp -= sys.PtrSize
 	}