cmd/compile: add AVARLIVE to peep for arm, arm64, mips64, ppc64

Fixes build on those systems.

Also fix printing of AVARLIVE.

Change-Id: I1b38cca0125689bc08e4e1bdd0d0c140b1ea079a
Reviewed-on: https://go-review.googlesource.com/18641Reviewed-by: Russ Cox <rsc@golang.org>

src/cmd/compile/internal/arm/peep.go

@@ -1366,6 +1366,7 @@ func copyu(p *obj.Prog, v *obj.Addr, s *obj.Addr) int {
 		obj.AFUNCDATA,
 		obj.AVARDEF,
 		obj.AVARKILL,
+		obj.AVARLIVE,
 		obj.AUSEFIELD:
 		return 0
 	}

src/cmd/compile/internal/arm64/peep.go

@@ -711,6 +711,7 @@ func copyu(p *obj.Prog, v *obj.Addr, s *obj.Addr) int {
 		obj.AFUNCDATA,
 		obj.AVARDEF,
 		obj.AVARKILL,
+		obj.AVARLIVE,
 		obj.AUSEFIELD:
 		return 0
 	}

src/cmd/compile/internal/mips64/peep.go

@@ -688,6 +688,7 @@ func copyu(p *obj.Prog, v *obj.Addr, s *obj.Addr) int {
 		obj.AFUNCDATA,
 		obj.AVARDEF,
 		obj.AVARKILL,
+		obj.AVARLIVE,
 		obj.AUSEFIELD:
 		return 0
 	}

src/cmd/compile/internal/ppc64/peep.go

@@ -953,6 +953,7 @@ func copyu(p *obj.Prog, v *obj.Addr, s *obj.Addr) int {
 		obj.AFUNCDATA,
 		obj.AVARDEF,
 		obj.AVARKILL,
+		obj.AVARLIVE,
 		obj.AUSEFIELD:
 		return 0
 	}

src/cmd/internal/obj/util.go

@@ -639,8 +639,8 @@ var Anames = []string{
 	"UNDEF",
 	"USEFIELD",
 	"VARDEF",
-	"VARLIVE",
 	"VARKILL",
+	"VARLIVE",
 }
 
 func Bool2int(b bool) int {